hey all, i'm thinking of purchasing an older 13 hp honda generac pressure washer. the engine is fine however its' pump has not been tested, as the wand and nozzle are missing. where can i find the parts and pricing for the parts needed (new or used)? are pumps, wands, lines interchangeable between manufacturers? also, is there any way to test the function of the pump without the wand/line? thanks, looking forward to your replies. have a good one.