So are you looking for a race fuel cell or a stainless tank built to stock dimensions?
If you want a stock type tank that can be ordered for either carb or EFI look into
Rick's Stainless Tanks And if you have the A1000 fule pump it can be installed into one of Ricks tanks.
If you want a true fuel cell I would go with Fule Safe...but it isn't going to fit under the car...the trunk floor will have to be cut or the whole cell will have to be in the trunk.