Who have you tried so far? Joe Suchy maybe? Tony's Parts maybe?
Neither of those, but will.
I was able to get the nylon side molding clips from Tom at R/T Specialties, which are working fine, but nothing on these "spider" clips.
I tried Bill at Special-T, and nothing there. (Not nothing... I did get an NOS pair of the front fender medallions! Nothing on clips.)
jt