Swim bait heads are tough go right now. At a reasonable price anyway. A "modified" do-it mold will be your best bet. Were you looking for s glue on style, a lead barbed style or a wire keeper style? At 3/8th or 1/2 oz. I assume you are fishing a single lure instead of an "umbrella rig". There should be more choices at the 1/2 oz. size. Many use Swim jig heads; either with or without the weed guard.