stock coralifes skimmers come with rio pumps, I rememeber reading that on my old coralife skimmer. more specifically they are called Rio Hyper Flow™ Professional Grade Water Pumps.
http://www.aquaticlifeaquariums.com.au/index1.html
The problem I see is that you need a different intake outlet inorder to get the air sucking in because these ones dont come with a stock one. I'm talking about the pointy end that you see for the coralife skimmer pumps with the air hose sticking out. Umm You going to need a pretty big pump maybe the biggest model? if it recommends 600-700 gph just gotta look at the labels and specifications.
Stanley,