Maximus you don't say whether it needs to be a 'factory' wide body. The ~'84 Euro GT5 on Ebay UK looks pretty good for the $$ if you do want an original, although the exchange rate is not in your favor at present. Closer to home (well in your case I'm not so sure, but at least already US titled) what about Emery's '74 GT5 conversion in Hawaii, a real nice example and posted for sale here very recently.
Emery's GT5 Clone
Julian
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