where to get replacement rear antiroll bar linkage?

[CMF_sukoo]

i have a rear antiroll bar install
it came from a japan used import workshop
but the problem now is that the linkage that secure on both the left and right side is spoilt liao
thus when u go over hump or bump
there will be a knock over them
when i first install the thing there no sound only recently when i discover it spoilt and the sound keep coming
any body nkow where to get the original replacement part for it? any one know the part nos?
thank