I stumbled across this and thought I'd pass it on. It does have ball bearings and the smaller motor pulley is included. For 77.00 delivered to your door, that's not bad.
http://cgi.ebay.com/ws/eBayISAPI.dll...fvi%3D1&_rdc=1
http://cgi.ebay.com/ws/eBayISAPI.dll...fvi%3D1&_rdc=1