Well, if you can't wall- or ceiling-mount them, I really think the soup cans are your best bet.
However, if you're set on stands, models that provide for an
"L Bracket" mount might fit the bill.
If you REALLY have to put them on stands AND the cost is killing you, you might consider just getting a pair of M2's for surround duty. They're fine speakers, cost much less than the QS series and have many more flexible stand-mounting options. Personally, I don't think they're quite as capable for this application, but it's certainly an option.
