Patella Instability Solutions?

I need a Total Knee Replacement (TKA) (no cartilage left, severe tricompartmental osteoarthritis, and both meniscus torn) and a Medial Patellafemural Reconstruction (MPFL) (for my frequently dislocating and subluxing patella). Yet, I have Patella Instability and Ehlers-Danlos syndrome (EDS), ( a connective tissue disorder that means my tendons and muscles have laxity that continuously increases despite physical therapy and/or surgery to shorten them).

I have been in physical therapy since age 11 and have already had a Medial Patellafemural Reconstruction (MPFL) as a teenager, but it failed as I became an adult.

The two surgeries, TKA and MPFL have different recovery procedures that cancel each other out. TKA needs a patient up, bearing weight, and walking (perhaps with an assistance device, like a walker). But MPFL, with the tendons and/or muscle cut and sewn back together needs no weight bearing for days and/or weeks.

Is there any company working on a device that attaches a patella to the femur or tibia TKA implant inside a glide (not just a groove) so that the patella CAN'T dislocate? I realize, I may sacrifice side to side movement of the knee, but I sublux weekly and it hurts and disrupts my life. It also means my knee keeps swelling so much, doctors don't want to operate on me until the swelling is down and I can bend my knee 90-120 degrees and can bear weight on it. So I keep having to postpone my TKA. Frequent subluxations also means my patella tendons are so lax, that I may end up dislocating after my TKA, which means I am NOT a good candidate for a successful TKA.

I'm willing to have a patellaectomy, but apparently, that also comes with the same patella instability if I don't have the tendons/muscles tightened. If I do have them tightened, then I am again having two surgeries with different recovery procedures that cancel each other out.