filler neck gromet

1970 dodge dart in trunk filler neck through floor to tank does any body no if any one sells rubber seal for this location i thought i saw a artical of cousre cant ind it that said this gromet gascet was the same on some other a bodie any please mine looks nasssty this is gasket where tube psses through the body its about 5inch by 11 any help would be greatly apr... thankz alot:happy10: