W-2 valves

Looking for valves for econo W-2 Long valve heads, Mopar #P5249195 intake,2.02x5.28,3/8 stem.P5249197 exhaust,1.60x5.29,3/8 stem.Mancini has them on back order.Anyone know who makes them for Mopar?Like to stay with the 3/8 stem.Thanks,Jimmy