I am so sorry to hear about Lex's diagnosis! I feel for you because I have been right where you are and it's not fun. The good news is that Lex's condition is treatable but the bad news is that it is very expensive.
From my experience at the orthopedic specialist with Truman (who had severe hip dyplasia diagnosed at 10 weeks) and Bentley (who had two TPLO ACL-repair surgeries), one of the major effects of undiagnosed hip dyplasia is torn ACLs. Lex was likely putting a lot of pressure on his knees to supplement for his hips, which ultimately led to the ACL tears. This is what happened to Bentley.
If Lex has torn his ACLs, no amount of therapy, medication or anything else can repair it. If left untreated, he will continue to struggle to walk, he will be in pain, and the joints will become severely arthritic. If he was a 9 year old bully, it would be a consideration to let him live out his days as best as he can but since Lex is so young, you'll likely have to prepare for surgery.
There are various methods of repairing ACLs but the one with the highest success rate on bulldogs is TPLO - more expensive but it's permanent. It reshapes the joint so there is no need for a ACL and they can move comfortably without it Bentley had it at 10 months old on one knee, then 25 months on the other knee and both knees lasted him a lifetime. The bad news is that it was $2700 per knee - and you MUST do one at a time since the recovery time is about 2 months and takes time.
Now, the hips are something you might be able to manage with medication. The hips are still in socket and there might be some arthritis developing but that can be managed with medication, supplements and other remedies. Because bulldogs carry SO much weight in the front, they typically are able to manage hip dysplasia fairly well. Most surgical procedures indicated for hip dysplasia are not great options for bulldogs, especially a hip replacement but once his knees are good, it looks to me like that can be managed.
The main thing is doing what you are doing - go to a specialist - someone who has seen this hundreds of times and performed hundreds of surgeries. They are the only ones qualified to handle this kind of thing and the only ones that can properly perform surgery.
I worry that Lex has to wait so long to see the specialist.
Bentley tore his first ACL right before Christmas one year so we had to wait until after to get him into surgery. While he can't do more damage to himself since the ligament is torn already, the vet did tell us that it is pretty painful and something most humans could not tolerate walking on. I don't know if you can get the appointment with the specialist moved up but maybe?
I know none of this is good news. It's upsetting and expensive and the TPLO surgery is no fun but Bentley did great after he rehabbed his knees and he had both done within a few months of each other and was moving great until he passed away.
Please let me know if there's anything else I can do or any other question you have...I am more than happy to do whatever I can! I wish I could fix Lex myself...bless his heart.
Also, here's a link to Truman's hip x-rays and also info on hip dysplasia:
http://www.englishbulldognews.com/forums/content.php?r=169-Hip-Dysplasia-in-English-Bulldogs
Since we treated him for hip dysplasia, he hasn't had any issues with his knees.
Poor Lex...big bully hugs and kisses!
) 
So we can pay that deductible......
that right there made my day. He played in several spurts with Libby and bo tonght. He was laying down playin so he didn't over do it. We are curled up in bed and both are passed out. So it's been a good day considering 
