Raz, you should have said who you were when you called TGM, i was there looking at the two cars on the ramps for you.
the tanks look very similar indeed (remember the floorpans or the two cars are also very similar.) with very slight differences to moulding, but not in an area that i think would cause too much hassle, the basic shape is the same as are the fuel filler pipe and breather, i am not sure about the fuel pump hole etc as the carpets , seats etc were still in.
it would seem strange for Honda to make it very different when the two cars are almost the same underneath.
If he cant find an ep3 one a dc5 one might be even more difficult. BUT i do beleive Tom said he had a spare one there.