In Germany we have to pay around 250,- Euros for a pair of individual down pipes in stainless steel.
There is a company named MAB, they are real specialists in doing exhaust pipe work.
We are looking to have a small series of downpipes manufactured there.
Discussion is about 2-in-2 or 2-in-1 system.
Pipe diameter can be 35mm, 38mm, 40mm, 45mm or larger. Bending radius is fixed to 70 mm.
Individual downpipes can be made, but they need a sample or a CAD file to produce that.
Some initial cost about 500,- Euros must be covered, if we look for a small series.