Well, now I feel silly. The part on Autohaus appears to be correct. The silly feeling is because I looked their first and when you look up by car make/model/year all they list are the buffers for the fuel pump which are smaller. For me, the search is over.
Oh, and the reason there are three, not 2, is because there is one on the bottom of the canister. Two on the sides, one on the bottom.