For those of us in the states,well nuts are readily available at MSC direct for a good price, most are less than a buck a piece, assortment packs are also available..FYI
I would guess Fastenal would have them as well...........havent checked on it yet. Grainger is worth checking also

I meant to post about wellnuts earlier...you just reminded me!

After calling the 2 local Ducati dealers and being told "no longer available", then waiting a week to get some from (who were great btw), I wandered into Home Depot looking for something else entirely and there were a good selection of Wellnuts in the automotive section of the specialty fasteners cabinet. Ducati parts right under my nose all the time!

Cheers

Home Depot,Thats great,keep in mind tho not all home depots carry the same stock so your mileage may vary, it always pays to shop around

Here's a good source for well nuts, especially if you buy in bulk to get the cost of shipping to become a little less significant....

http://www.desmoparts.com/ducati/wellnut/wellnut.htm