Hi, dherde26.
Don't know how long you have been around this site but, I've been lurking for 4-5 years, and lots of people on this site myself included have seen offers like this come and go.
Designing a proper tubular "equal length tubular header" for the L6 is a difficult and potentially expensive proposition with many problems to solve.
Many have tried to offer a "turbo header" for sale here, I'm not sure any have truly succeded. S.F.P. comes to mind.
That being said, If you were to come up a header with:
304 (may not take the heat).
316L (better choice), but more expensive.
321 (the best) cost no object.
Nice beefy flanges cold rolled steel or 304.
Flex or slip joints if and where necissary.
Offer an external wastegate pipe either with or without a flange mounted. An option of T3 or T4 turbo flanges.
And the option for bracing for those of us with large turbos to mount.
I'm sure that many here would be willing to spend real money for something like this.
How long have you been fabricating?
Can we see some examples of your work?
If it looks good, is tested and seen to be reliable for moderate to mild abuse, I personally would pay $500.00 to $800.00 depending on the design and materials used.
What does evryone else think?
Mike.