There is a company that sells a short sleeved "t-shirt" that you can wear under your outer clothes that has a pocket sewed into it for their proprietary recoil pad. The unique thing about this pad is that when you receive it you go through a procedure that softens it, then you slip it into the shirt and mount your gun to the exact spot that you place it on your shoulder when shooting, then hold it there for a minute or two. It molds itself to the curvatures of your shoulder and supposedly becomes much more comfortable.
I bought one before I went to Argentina the first time, thinking it would be nice to have there. Within the first five minutes of shooting I pulled it out of the shirt and put it in my pocket, never to return. I just don't like the feel of the gun mounted against a pad like that, or the Reactar. Sorry, I cannot remember the name of it to save my life.
Your condition may demand something of the sort, and I hope it works out for you. I also hope you get the shoulder repaired and have a full recovery. I'd hate to know you had to shoot with one of those pads all the time. It would take a lot of getting used to, for me.
SRH