if it was that loud it must have had a crap exhaust on it, something like the Japspeed K1, which is just a big pipe, makes loads of noise but sacrifices the note
Just keep looking on ebay, autotrader etc as you said, you know what to look for, clicking axle, gears and thats about it, FSH is a gooden too. Dont be put off by slightly different shade bumpers/ plastic parts, there all like that for some reason, paint must react differently on plastic too metal.