Exhaust studs and double brass nuts

[scampbel98]

I'm looking to replace all of the manifold and flange hardware on my 1.8L.
Any one have recommendations or a source?
I'd like to use those double brass nuts and thick washers.

I'm replacing an ill fitting long tube header with a stock 4-2-1 setup

[wizard124]

The stud is 1.25 X 8 mm. I would think you can source them at a Napa or large auto supply store.