Replying to My Fucking Knee

So last year was my second ACL blow out and I didn't have the money to get another surgery. I can't sacrifice the season and I've been working it really hard at the gym. It's really stable now especially with my brace. Does anybody have any good knee-type exercises for those of us who are ACL impaired??? I know I should just front the cash and get it done and I'm risking permanent damage, blah blah blah, but I just can't watch this season go by on the couch.