Cool! you freak.........
I feel your pain. I've been carrying a damaged knee for 25 years now
I'm going in for a rebuild in November. New ACL (using a lump of tendon from elswhere in my leg), a smooth and trimdown to the cartilages and a smoothdown of all the bones in there, and a bloody good hoovering out to finish it off. I'm told that whilst my knee is very badly damaged, overall it should repair well.... i'll let you know in 6 months....
Knee technology has come on leaps and bounds in recent years; mine will all be done via keyhole with virtually no pain so I'm told. You should look into getting yours fettled, even if its a lot more work than mine they can still sort you right out.
Failing that, check out the CTi kneebraces. They are superb, acting pretty much like external ligaments to keep the two halves of your leg together
Take care of that knee buddy