I had a look at getting a fiver ricky "homage" made by some of the usual suspects.. My specs were 35" scale, 37 mm string to string at the nut, 70 mm string to string at the bridge. Lots of ideas out there, but the budget (neck through) was sneaking close to £2k, and I realised that the chances of ever getting a significant amount of money back was near zero. There is a "rickenfaker" facebook group, and Dave Koenigs 5 string versions come up occasionally.
I suspect an original 4001/4003 fiver would be horribly cramped, and the B string would suck..