It would take me a few days to round some up and scan them in, Bikermouse. But I don't think they would do you any good. You couldn't accruately model one without measurements, and a LOT of them. A 5-string banjo is an extreamly complex object. For example; the clamshell tailpiece, the shape of the neck, or the exact placement of the frets. I know, I play one. :) Gibson Instrument Company might have exploded drafts with detailed measurements/dimensions. A quick internet search would give you more images than I could. Do a search on "Banjo Gibson" and you'll see. ;)

 Don't sweat the petty things, and don't pet the sweaty things!  ; )