Once the manufacturers decide the profit is too small to keep a round in production the supply is fixed and can only decrease over time. Those who have a firearm in an obsolete caliber are well advised to lay in a supply of ammo and to keep their eyes open in case an opportunity to get some more arises. Center fire ammo can be reloaded, often cases can be made from other rounds but the old rim fires are another matter. No really workable way to reload. The 32 short and long and the 41 short were last produced in the late 90's iirc. The old 25 Stevens hasn't been made since CIL closed shop in the late 70's. These seem to be the most popular and requested old rim fire rounds and the prices seem to be on a steady upward climb. Would be nice if someone decided there was enough demand to bring them back but I'm not holding my breath waiting for it.