), a reloading service that I do business with, has what you are looking for. Nine bucks and change per box of fifty with your spent brass in exchange. I have fired off at least 7,000 (stopped counting) of their .38sp and 9x19 reloads without a single bobble. I highly recommend them, as do others on such websites as this one. For what it is worth, I shoot their hardcast 148gr DEWC range load, and have never had a leading problem with them. Right now, with things being the way they are, Mastercast requires your brass in exchange in most calibers (not 9 x 19). I send up to 1,500 spent cases in USPS Priority Mail's nine-buck-and-change box. Any other way I know of would cost twenty.
As your other responses indicate, I may have provided you with your only source of 148gr DEWC copper-enclosed ammo.