Hey
There is a saying I have come to respect and live by in life for all matters material. Dice it, change it, protest to it, but "the cheap,...... it comes out expensive". There are services out there that fix the taillight and one in particular I have used Travis Wolfe.....he also lists at E-bay.
IF ........you can get the unit apart and you do not crack or splinter or warp the lens, then what ? So you replace the Power board with used ... You could get lucky, but who is to say you don't get one that is at near end of life? And what about the LED's ? When they start to go, it is like a cascade,....... first one, then the next and so on . ....and as each one goes out, it puts stress on the remaining functioning lights and also on the P/S as the current draw changes. You are really making a foolish choice if you attempt it. The repair service is I think 600 dollars. That is cheap, and you do not wreck a 2 to 3 thousand dollar light assembly.
Bill