Lightweight spare tire!!

Sooooo, is the 90's FORD Crown Vic bp 5 on 4"? Lemmee guess, the metric equivalent?! I'm looking for 14 or 15" skinny-ish wheels for my early A body Dart. I'm going to run moon discs so what they look like is secondary to all else.

No, Ford is 5 x 4.5" -- BBP. Nobody ever made a spacesaver spare for SBP Mopar. I'm sure back in the day some drag racers had SBP skinnies, but I can't say I have seen any. Maybe Centerline makes one?