Tank relocation Question

[stexag]

I am seriously thinking of going w/ a Boyd tank. I thought about it but didn't have it in the budget when I put the A/C in. Now that the windows are up and the smell of gas is irritating me. The sting of purchasing the A/C is fading and a tank relocation might be on the horizon; but I have a question -

For those have done this and wanted to maintain the stock tank look or didn't want to have to deal with the body work of filling the tank neck hole - is there a way to fabricate a dummy neck and still gain the space behind the seat? TIA