Or make a cold molded one - here's how:
Cut leather to 1 inch bigger than you want plus had the flap to close it (lay out itens as you want them to gwet the size)
Soak leather in cold water until saturated.
press in towel so it does not drip.
lay wet leater over items and place weights (books, bricks, whatever as needed to make it mold over the items.
Leave it there until the leater dries - Yeah I know no gear overnight since it is the mold for your holster.
Now sew a flat leather back on it, attach belt clip ot sew a leather loop on (sinew or dental floss works best) attach a snap or other fastener. Vioila custom holster. Yes it works, learned it from a gun collector who makes holsters for a living.