I believe I recall that circuit board appearance now that you mention it. I played around with the cover to remove some bugs that got in there and died. If you learn where to get a replacement light like ours, I would be interested in your findings. I'm sure it's a matter of time before I might have to consider a replacement due to age and/or use as well.
I'm glad the approach I suggested worked for you. I was a bit leary at first because I didn't want to snap the plastic.
"Stateboy" (Formerly "36fire412")
SW Lower Michigan
2012 Toyota Tundra Crewmax TRD 4x4