Yeah Timewalk could get it done. They've had unique boards for the SNES developed, if they spent the money + time they could get the right board that'd make the Final Fantasy 7 doable on a cart.
Plus they'd have a very cool manual, box and probably poster with their release, which is always appreciated.
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To-do manuals: Arabian Knights, Gulliver Boy, Dark Law, Brandish 2, Flying Hero
Finished manuals: Neugier, Wonder Project J, Burning Heroes, Star Ocean, FEDA, Monstania, Chaos Seed