This looks to be extremely heavy duty, inexpensive, and comes from Harbour Freight.
http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=93252
http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=93252
Can't go wrong with a lyman. Mine is 3 years old now and it's runs almost daily...