GM Fuel Line Fittings- Metric Union Source??

[itsagaas]

The fuel line supply and return lines are badly rusted on my '96 Hoe LT. I have beautiful stainless steel replacement lines and don't want to use those nasty looking rusty, original fuel line unions. These are on the 5/16" return (14mm x 1.5 thread male fitting) and 3/8" supply (16mm x 1.5 thread male fittting) GM-type flared tubes with O-rings. I have looked all over for new unions preferably in brass or stainless with no success. Any source recommendations are appreciated.
Thanks,
Ken