I got tomos on mine, it took some modifications to brake stop and spacing but works. Not a vip, but same wheels. I think you'll need to be 16" wheels. The thing you're mostly looking for is same size wheel or smaller (16s can work on 17, but not usually room for the reverse) and that the chain and brakes are the correct sides, some bikes need brake opposite, some they're on the same side, does it have a separate pedal chain etc.
Everything else is pretty easy to adapt as needed with spacers and washers and such. Also helps to find something with similar size sprockets.
Italian like minarelli morini or other garelli will be easiest, tomos has some neat mags tho but a little extra work