I remembered I have the 1980-81 parts catalogue which has the flipper assembly, so I will scan at work and post within the next hour and that part does not match what's listed in the book. Though in saying that the flipper assemblies of 1980 were commonly retro fitted with the next generation kits as this particular one was not as good.

PBR have the flipper kits for this era as the Skateball I had had this era. The parts catalogue covers the Flash Gordon as well. All four of the flippers were of the style in the parts book.