I got mine for Stefan @ Ducparts in Germany. Didn't cost much in the grand scheme of things, and more importantly, THEY ARE CORRECT!!!!!!!! Don't worry about the number of rivets in the auction below, send him a message and he will sell you however many you want at.
http://www.ebay.de/itm/Auspuffnieten-gasdicht-Ducati-Modelle-2-Stuck-ALU-Sil-Moto-Termignoni-/171446553695?hash=item27eb02cc5f
I've bought piles of stuff from him to rebuild my wreck, and he's never let me down. All his second hand stuff is cleaned immaculately, and in excellent condition - some things I got from him I though he'd screwed up and sent me a new one, but if you looked hard you could see it had been on a bike.
Couldn't find them here when I was looking, but then I'm on the west coast so that probably explains it 🙁
