Sure, just pull the whole thing out and mount individual seats; drill, rails, done, and they'd be adjustable too.
There's a US company still making XJ13 and D-Type gliders, in alu or GFRP, I have their info somewhere... here it is
. I saw one of their D-Types not too long ago and it was a work of art, really well made. You just supply your own drivetrain, suspension, interior, and brakes.
Also, I got a couple PMs asking about where to find salvage exotics, like the F12, and online we generally sift through CoPart auctions
. There aren't any F12s now, I've only ever seen the one, but there's a 458, a couple Californias, a DB9 (with MT!), and an Aventador up right now that look reasonably salvageable. However it's generally best to catch them before they get that far, which usually means digging through the insurance companies claim systems. But that takes a special paid membership to access, just to even look at the lots, so I can't help much there.