I'm looking for a single (one, uno, un, enn) M6 nut with a left handed/reverse thread

It's to fix my blender. I can buy a new one for $35 but it seems a waste when I can just fix it by replacing the missing nut. 

I've called in to a number of commercial nuts and bolt suppliers here in Hamilton (there seems to be quite a few) but no one can help. Some can order them in but there are minimum quantities.

Plan B is to buy a set of 4 from eBay at a cost of around $13 or 50 for $25 - better than buying a new blender I guess :-(

The annoying thing is I remember finding an m6 nut on the kitchen floor not long ago and threw it out thinking I had a whole jar of them not realising where the nut was from or that it was a reverse thread.