Chop-Rite used to be known as Universal way back. They are still made in Pennslyvania. Many people still have 50+ year old Universal manual meat grinders in use. I just bought one recently but I haven't put it into use just yet. I too have a #10. I'm thinking of getting some additional plates and possibly a sausage stuffing tube or two for it.
Not sure about the Porkert, but the Chop-Rite #10 will run you about $110-120 new. They are supposed to be just as well made now as in the past.
http://www.meatprocessingproducts.com/chop-10-chp.html