The present invention provides an injectable mold (600) for forming a breast implant spacer, comprising an outer shell comprising a convex first portion and a flat second portion, having a plurality of fill ports (601), a plurality of air efflux ports (602), and a plurality of septal anchors (605), and an internal bladder (606) having a liquid fill port (603), said plurality of septal anchors stabilizing said internal bladder within said convex first portion and said flat second portion, said injectable mold approximating the volume and the shape of a breast implant.
