LA Engine Header Stubs

I have to build headers for a couple small block cars in the next year or so and I'm trying to find a source for LA/Edelbrock style header flanges and UNWELDED stubs. Header flanges are easy to find, and I can buy the flanges with the stubs already welded in, but I would like to find either just the formed stubs, or unwelded stubs and flanges. I made a mandrel to swedge BB header tubes years ago, but you only need 1 for BB's - but I would pretty much need to build 4 different mandrels to do a decent job for LA ports. So, anybody know of a source for the unwelded stubs? And any other good sources for mild steel mandrel bends? I usually use Columbia or SPD Exhaust, but I'm always looking for other vendors for better pricing. Thanks

I bought a header weld up kit for a small block chevy from Summit to build my headers I think I bought the flanges from TTI.

Mostly looking for the un-welded stubs. I only mentioned the mandrel bends because it never hurts to find other sources.