I just bought a 250 round box of Ultramax brand .38 Spl at a Dick's store today at a sale price of $25. These are 158 gr lead round nosed bullets so they are nothing special. I would think you could order some .38s from them to be added with the next shipment. Other mail order places you could try are Cabela's, Sportsman's Guide, MidwayUSA, Natchez Shooter's Supply, and Graf & Son. You could also pick up a copy of Shotgun News, there are companies that specialize in surplus ammo and you could get contact info there.