Rate-Limiting.

I've got a situation in which I'd like to rate limit a few servers that hang off of my 6590's... it appears that this can only be done on a layer 3 interface. These servers however aren't, they simply on a switch port / access. Aside from hard setting the l2 interface to 10mbit, can anyone think of another creative way to do this? Is one option moving these servers into a separate VLAN, then rate-limiting from there? Rob