Waiting for parts, edelbrock..

I believe I'd give these a shot
SCE Gaskets Copper Header Gaskets Stock Port Fits Dodge Sm Block Magnum Pair | eBay

or maybe these

Remflex 6004 Exhaust Gasket for Mopar V8 Engine, (Set of 2) https://www.amazon.com/dp/B00B2HMEY0/?tag=fabo03-20

I've been running Percy's seal 4 good header gaskets for years and they're amazing.