FS JIG Mold
Fat guys fishing has a 1/16th pill head with keeper. He just calls it a freestyle jig mold. He is very popular and stays busy. He has his lead time posted on his main page.
I’ve used palmolds too. If it’s in stock it wasn’t hard to get here but I’ve read their lead times are longer than fgf. The mold was good though.
Another thing that is possible is to find a mold with all 1/16 round heads. Alter it to fit a keeper. When poured you could use some smooth pliers and squeeze the sides flat to make it a pill head. It may loosen the keeper but a quick bit of superglue may help.