Thanks!
I've got a Little Giant 2-MDQ-SC. It'll do > 500 gph at 1 foot of head.
http://www.lgpc.com (look under magnetic drive pumps)
The spec I posted, is actually for when the outlet diameter is less than half of the inlet diameter. I've got the complete page from the book. PM me an addy for it (I've got a scan on file, somewhere...)