Here's a 30mm Mikuni for just under $34.00 US, and it is shipping from California:
http://www.ebay.com/itm/Mikuni-Carbu...6929eb&vxp=mtr I've purchased several from China and had terrific results, once they're jetted properly.
That could be a Hummer, but I'd need more pics. It doesn't look like you have the goofy shift linkage on yours, which is a good thing.