We frequently have customers coming in and looking for a specific OTC item that we don't carry. If they mention it's "really hard to find" I always offer to check our wholesaler's catalog and order it for them if it's available. This can be sort of an interruption and can take a few minutes, as sometimes finding the specific item is easier said than done. But I'm glad to do it, because I've wasted many a trip looking for hard-to-find items myself (I think every OTC med/hair/cosmetic/skin product I've ever really, really loved has gone from hard-to-find to discontinued right after I discover it.) If the customer asks me to order the item I do, and I advise them it will be in the next day. The next day it comes in and I carefully set it aside, sometimes with their name on it.
Which is why it kinda bugs me when they never come back and get it. It would be really easy for me to shrug my shoulders and say, "naw, we don't carry that". But I made the effort, so please, come back and get it cause I really have no use for it. We've had many of these oddball items sitting around for months collecting dust. Don't ask me to order it if you're not coming back --- I've got other stuff to do !!