wanted perf carburetor 17mm or larger used?

they have decent mikuni clones on ebay cheap
I have an 18mm one on my china girl which runs great :)
there is a 20mm on ebay for $34 shipped I may go with that one if I cant find a used carb or whatever
the kit looks nice papa but Im super broke at the moment .....
this is the mountain bike one as it is now sorta :)

thanks for your help guys