M48 8mm ammo
David, the cheapest and seems like the only place to find currently 8mm surplus is at SAMCO global. I just ordered 400 rounds for my M48, something like $112 for 400. Their shiping price is a bit high, depends on where you live. I have dealt with them for eons and have always got what ordered. Not exactly fast delivery, but you get it eventually.
You have to fax a copy of your drivers license or a photo ID and a letter that you are not a criminal. Both forms are on line