Those LED lights are junk, BUT, they have a lifetime warranty. Seems to be a very common replacement. I looked around and decided against swapping my LEDs every year and bought something that (I hope) will last.
Anyway, I found a few parts here. Looks like this is a good starting point, but I didn't see your specific part listed, maybe give them a call? Good luck, and please report back if you find a nice and easy solution! Worried I may fall into the same boat someday!