Check out the castboolits website at castboolits@gunloads.com
look under the group buys section. There may or may not be an ongoing buy for one of Swede Nelson's Night Owl enterprises
9.3 molds. I have two of his two cavity aluminum molds, one is for an oversized .316 bullet good for worn 1891 argentine mausers and some lee enfields. The second mold is for the 9.3x57 I have and it casts .368 about 280 grains with gas check shank. Excellently made molds and he always has a backlog of orders. If you pm him he may or may not have a 2 cavity mold from the last order. Never hurts to try. My 9.3x57 is made on a pre war FN action. So its an oldie.
Slug your barrel first before ordering as the bore diameters may need a bullet diameter of close to .370. Hope this helps Frank