What does "mit ABE passend" mean in an ad for an exhaust can? Does it mean it's a road/race use silencer? Unfortunately Google can't help me about the "ABE" stuff.
Are you just looking for any can, or a specific can to fit your pipework? The one in Germany is an original and bloody heavy! I can't imagine that carrying two of them on the back of your bike is good for acceleration....
I'd recommend trying any autojumble. I saw loads of pairs of carbon cans for about £70-90 at the last BMF. Not too pretty, but miles lighter.