Repeat this for a number of weeks and/or months till you finally snap and get off your ass to make an order to replenish stocks. Well, I was a victim of this a couple weeks ago. With the number of empty plastic trays stacking up in the "to be ordered" pile, I finally made the order.
Besides refilling existing sizes, I added some new ones that I wish I had, but was unable to find previously. Stainless steel ain't cheap. And our preference for square drive heads doesn't make it any cheaper. It was painful.