I second Murphy's. I sent both of my stainless props to them after I purchased my used Grady. They trued, polished, tuned and stampped my last name into the props for a very reasonalbe fee. If you send via UPS/FED-EX, be sure to insure for full replacement value -- just in case.
Call them and they will give you an estimate over the phone. Turnaround for both props was about a week.
BTW-- St. Mary's county is in southern Maryland and sits between the Potomac and Patuxent rivers.