Your too best options right now are Increased Primary size Log Design and stock primary tubular, both of which can be had ceramic coated for under $700.00.

If you get sets for under $500.00, you may have a few customers. If you get LT under 1k that show significant performance gains you'll have a lot of customers. 1k for LT is cheap in the high end header market.

Either way, at least you'll have a set of headers on your car.