You have the same issue with the conventional bombs and their guidance kits, which when delivered in contested areas are not usually cheaper.

The issue is general industrial capacity, not missiles specifically.

JDAM's are a lot cheaper. They are a guidance kit bolted on to a MK-82 gravity bomb. There are a lot of MK-82's in stock, as they have been made since the 1940's.

Problem is you put a crew and an expensive airplane at risk.

We are out of missiles because the current administration wants to minimize combat losses. Looking at the dollar cost; it seems like a bad idea. But is this war worth any of our soldiers / sailors / airman ? (no)

The issue is restraint, an all out bombing campaign with no regard for civilians or international condemnation would do the job in a month