Shoulder brace to help prevent dislocations?

Hi everyone.
I experience a lot of trouble with my shoulders, when wakeboarding, kitesurfing and snowboarding. The doctors wants to give me surgery, but there's alot of waiting for it to become reality, so I hope i can get through this summer and maybe get the surgery in November/December.
So thus far I would like to get a shoulderbrace that can help prevent the dislocations, and i think I will keep using it even when my shoulder is fixed.
It is almost always my left shoulder that is the problem, so i think that if I fix that, the right one will be okay as well.

I hope you guys can help with some suggestions.

If you know where to buy these braces, I hope you know some pages that maybe are located in Europe, that it is alot of hassle to order from the US to Denmark