MSD sells injectors (Multec? style made by Rochester). In my several year old catalog the price for 19lb/hr(5.0TPI) or for 22lb/hr(5.7TPI) is $45.00 each. you might call them before spending a pot of money. the company phone is (915)857-5200 and customer service tech line is (915)855-7123. They are in El Paso, Tx.