I think the Auralex Mopad looks like the right option for isolating my in-cabinet 340C from the cabinet it's sitting in, and also for tilting it up a bit.

The Mopads seem to be sold in a set of four -- for isolation of two speakers. But I only need one pair; my other speakers already have mounts/stands.

If you've purchased Mopads and have a pair left over, or if you want to split the cost of purchase, send me a Private Message.