Your best bet to find a VB is either off ebay, here on NA, or at a local retro store. You should be aware that VBs have a not insignificant chance of developing eye piece issues over time, regardless of how they were treated by their previous owners. So you should either be prepared to perform DIY fixes, or set aside some cash to have someone mod the VB to fix the problem.
-------------------------
My son... gives me Helpful Nintendo Hints that are far too complex for the adult mind to comprehend. Here's a verbatim example: "OK, there's Ganon and miniature Ganon and there's these things like jelly beans and the miniature Ganon is more powerfuller, because when you touch him the flying eagles come down and the octopus shoots red rocks and the swamp takes longer." And the hell of it is, I know he's right. - Dave Barry