if you get a "group buy" together so you get a bunch of them, I can ship from the USA - the shipping will cost more than the nuts (see my web site, wbnoble) but it may still be less dear than buying locally in small quantity. I buy them in 250 pound barrels and go through a barrel every three...
I make faceplates using these nuts, I have a web site with pricing and stuff (wbnoble) - apparently my account doesn't have permission to post the site url - but if you were to search for "welded faceplates", it will turn up near the top, I think.
That's the good news.
The bad news is that...