c32///

took my c32 to the my mechanic for a battery drain issue (wasn't seat module or overhead console, was the washer fluid heating element drawing 4 Amps). Anyways, we pull out the car and there is a loud clunk after about every revolution. feels kinda like something is stuck in the rims...kinda hard to explain. Anyways, I heard the sound before, but now its constant and un-driveable. Looking for my options now, already called a couple places, anyone with input please chime in:

OPTION A: Used C32 Diff.

OPTION B: Qualife LSD

OPTION C: Kleeman LSD

now i know all the ups and downs from other threads but anyone done this before or have reviews on the LSD..a usde c32 diff IF FOUND, so far we cant find one (Canadian Junkyards) is around 800$. Let me know guys!