Chris - if you haven't already looked,
is a decent reference site. If you don't have 3-phase power, they've got some info for converting three-phase tools for single-phase use here:
If phase conversion is what you're after, the speed and direction control offer by VFD would probably work well with a power feeder, and is pretty affordable if the horsepower rating isn't too high.
http://dealerselectric.com/mfg-subcat-i ... 165&mID=-1
VFD units usually available on eBay too....
Lots of furniture manufacturing business around here. The economy has been especially tough on the smaller ones, so quite a bit of industrial-type/3-phase stuff has been appearing in auctions or with used tool dealers.