Jason Belec & Dzip - thanks so much for the feedback!
Dzip - I’ll try to post how I’m rebuilding the models soon - it’s nothing fancy & probably not the most efficient way of doing it. I’m just using the append poly tool in Maya and point snap to build out areas & then the split poly tool to dice it up. I just got Silo, so I’m experimenting with the topo brush, but the program is still too unfamiliar to me to do very much - I just need to take a day and read the docs.
There’s also the xyShrinkWrap mel script that lets you make one mesh conform to another - I’ve played with it a little & it seems to work pretty well.
The best resources I’ve seen for re-topoing a model are Zach Petrok’s Zbrush DVD and the CGToolkit DVD where he rebuilds a digitized sculpture.
Scott