If a product is on the backorder list or is listed on the site with a (0 products instock ) next to it you can per order it. I check my stock every morning and put together a list of kits that need to be assembled. Fast moving kits go to the top of the list. I do my beat to keep on top of all the kits I make so I don’t run out and if I do I’m only a day or two away from restocking them.