ChewToy: Peak head at zero flow is relatively unimportant, as well as maximum peak flow. It's the mid-range (3-10LPM) and power-draw that counts, and what you've quoted there is just about damn near perfect at the 2700RPM line. Even better mid-range head than I was talking about. Slightly higher power draw, but 4W is neither here nor there when talking about a bit of extra mid-range punch.
A nice
60W x 24v PSU which can be bought for $36 Australian, or ~$25US, would do the powering job perfectly and fit inside a CD-ROM bay.
Yep, that'd come as close as any pump I've yet seen to those specs.
Where from and how much? Size?