Had them for a couple of years and used them with Triangle Ventis XS and Naia models. They sound absolutely fantastic in this context and there is a good reason why Triangle uses them as internal wiring in their uber-fi Magellan series. They are full, fast and on the bright side of neutral so take care with the partnering electronic equipment. With tubes or smooth sounding equipment they are magical.
I am not aware of where you can find them States side; their UK distributor (ukd.co.uk - awesome people) offers them for 30 pounds per meter. Also check the French e-bay site: a vendor there sells them for c. 50 euros a meter.
