Ordered a new clip for my side, sliding window on my 90 stat. wagon- was sent sone which looked very different- one ive seen used in the back window of new truck cabs. So, sent it back with picture of mine required. However , they say this aint an original clip and cant replace- please see photo: anyone any ideas as to who it is made by and whether I can get another- the part that locks in has snapped off. A single screw goes into it to attach to other side, puzzling me.