I've got very similar on the 900SS, slightly dished carrier but otherwise similar profile. Brand name unknown, lasercut stainless steel. Also bought off TradeMe.
They're OK. Ducati OEM they ain't, though. They seem to be wearing relatively quickly (5.0mm brand new, 4.7 - 4.8 mm about a year and a half on, with a 4.5mm wear limit), and I'd picked up a nasty pogo-ing brake behaviour. It doesn't seem to be a thickness variation problem, instead a grip variation in the wheel's rotating position. My guess is that it's a characteristic of a grained material, which is why good discs are cast, not rolled like sheet is.
The stainless has discoloured severely over winter, with the beginnings of rust spots appearing.
They were (at the time I bought) a quarter the price of Ducati OEM from the dealer, so actually pretty good value... but have a look at this:
http://www.stein-dinse.biz/advanced_...words=78B40870
If it doesn't come up, Stein Dinse have Brembo discs for 170 Euro each. For 240 Euro there's stainless.
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