Working on electronic ignition conversion for HP273 dual point distributors

Back when I did mine I couldn't believe they didn't have one listed. But, that application was only for 3 years. They were good enough to get me one that worked by sending a distributor to them and they matched one up.

Hello, 4 months later, and I'm back! Over the winter I tore the engine down to cast iron block and reciprocating assy., replacing all servicable parts, cleaning, painting etc... and now I'm about to put dist. back in, (after relieving some material from the vac adv., and replacing the washers and clip)

I was going to continue using my old cap & rotor, then decided to replace them too while I'm at it, but I cannot find a definative answer as to what dist cap this cast iron dual point (Chrysler 2642242, IBS 4013) will require?
Is this just a typical Mopar cap & rotor, or is it a special one? If so, are they readily available? I found a listing for Echlin ECH AL125 rotor at Napa, which is for dual point, but so far no dual point specific dist cap listing.