I've got three tanks here in Pekin, Illinois, but they're all off of trucks...you don't really need a carbed tank though...an EFI tank would work ok, just cut the fuel line that comes out of the tank and hook it up to your existing fuel line...don't power the EFI pump though...you can pull fuel through the in-tank EFI pump just fine.
Or i could build you an aluminum tank...it would hold more fuel than stock. I have an 88 4runner, my friend has an 87 and my other friend has an 84, so i've got trucks to measure for dimensions.
If you put on a little body lift maybe a truck tank Would work.
And it amazes me how few people put their location in the post or in their profile...