I had a "half Bass" truck for a short while, the right side cover came off (I had painted and replaced the right side taillight) my guess is the chemicals in the paint didn't agree with the covers adhesive strips. I tried to order just the right side cover from the manufacture, (V-Tech, Inc.), and they said NO, they could not send me just one side, so they replaced the complete set for FREE,
all I had to pay for was shipping, (OMG there's that word again, but I digress)
I was amazed with their response to my problem, they could have just as easily said SORRY, but they stepped up to the plate for me and hit a home run.
IMHO,,, Bottom line, if you want a set buy V-Tech, they're an American company, not some off-shore import.