If you are good with soldering SMD's you could give it a shot. How far out of warranty are you? not original owner?
I was wrong though, the LED does have a center slug, see above: Kingbright AAAF5051-04. That will be no fun. heh.
The amount of issues you are having is obscene, I have never heard of that many boards having issues. I would try reaching out direct to jack with a carefully worded honest email describing what has happened so far and see what he can do, PM me if you need his direct email addy.