We could think of July 19 when I'll be free somewhere in Southern Bayern.
Anyway, a detour though Munich would probably take a bit too long as well (and I will probably commit to my old plans by buying the Innsbruck-Trento section when I'm in Innsbruck tomorrow - compulsory reservation as it's the night train to Rome, but OeBB does not sell it online).
it should just be listed in english as the Zurich youth hostel, although you don't need to be a youth to stay there.
if you don't like that, try Dakini's B&B for about 70 chf for a single. there are other b&b's as well, but I know that one.