By coincidence I have a bunch of header flanges for Small Block Chevys, LSxs, Ford mod motors, and Small Block Fords that are cnc machined (not laser cut) so they have much better surface quality, flatness, etc. They are all gasket matched to off the shelf fel pro gaskets. I would assume by your user name youre looking for flanges for Supras and the like which I do not have any of.
If you need any for these motors I am looking to unload them cheap as I have quit selling turbo parts online and am working as a Engineering Tech. If youre interested PM me for my phone number.
CNC Machinist & Engineering Tech
B.S.M.E. Student (Graduate 2013 @ UCF)