Washer set for manifolds

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

Hemi Performance (also Aus) has these. They note that they are flat. But I think these are closer to original shape and a few bucks cheaper. As long as they are around, I would rather have used originals though.