RE: Mopar F-Body with V8 and T-Roof
Keep an eye on eBay - such animals do pop up once in awhile.
In addition to the F body Aspen/Volare, as far as T-tops are concerned there were also the 1977-79 B-body Cordoba/Magnum, plus the 1980-83 J-body Cordoba/Mirada. If you really want a rare T-top Mopar, look for a 1978-81 Chrysler LeBaron/Dodge Diplomat coupe.
Finding one in turn-key condition, however, may be all but impossible unless it's a one-owner garaged creampuff. The Ts on those all leaked like crazy which wreaked havoc on their interiors and caused early rust-out among other things, so if you do manage to find one, inspect VERY carefully.
If you don't mind FWD, the 84-86 Dodge Daytona/Chrysler Lasers also offered T-tops.