Only numbers like that in an old catalog I have are for 2 DuCoil Distributors D51C 55-62 PONTIAC V8 D51CI 1958 PONTIAC V8 W/ FUEL INJECTION Any of the DuCoil part numbers that began with a D were for GM engines
Good luck finding caps and rotors for Du Coils. They bring very high prices on ebay. I think there are some non Du-Coil brand points you can get that fit them (some Mr Gasket branded older points fit them). A couple of people have talked about re-popping the caps, but as far as I know, no one has stepped up with the money yet.
I do have the cap and rotor for this. Everything is unused, to bad it's not for a more disirable engine. And it's just a DuPoint not a DuCoil also.