Something you could try is to price the parts separately - the stuff you actually need & will use. I acquired the following, mostly from Z1Enterprises: float bowl gaskets & top gaskets, choke plunger caps & choke plunger o-rings, and a metric nitrile o-ring kit from HarborFreight. The o-ring kit had several sizes that were close enough for the application - the ones for the drain screws, main-jet/bleeder-pipe & pump nozzles. My carburetors were in fairly good condition & didn't need any jets or needles. Maybe your situation is different... just a suggestion.
Also, CycleOrings.com may sell o-ring kits specific to your bike. The website is kinda plain-jane & bare-bones, but I'm fairly certain he's legitimate. I found out about him over at TheGSResources Suzuki forum.
