Washer set for manifolds

Sources for new hardware:

The triangular washers are available new out of Australia: AS0190s Slant six Valiant steel manifold hold on batwing tabs | Aussiespeed Street & Racing Products Australia

I'm not sure if the conical washers for a small block V8 are the same as the center washer, but there are these from Mancini: Mancini Racing Exhaust Manifold Conical Washer

Flex-top locknuts: McMaster Carr has these. McMaster-Carr

Brass Washer - p/n 53010091 I don't know where to get them.