For a shimano part which isn't imported. They may have it, then again maybe not. But I have heard of an onlibne german bike store, the wife is a german speaker, so lets give it a go.

www.hibike.de may be the one you were thinking of. I've used them a cuple of times now, and they've been OK. Delivery takes about a week. They do have an Englisch section on the site.