I kept promising myself I won't mod the beater but I'm itching since it's the on the road.

Yep that lasted all of two days.
The only stainless tubular manifold I have in stock right now is flanged for a Garrett turbo. The Mitsu flanged ones will be here in Feb. Not sure if you were wanting a Garret flanged manifold (it's the one the was on the old ebay ad)
Maybe we should put our heads together for some type of multiple parts and cash swap? Unless you want to trade some cars instead