How about a bulk order list that turns up every now and then from weapon stores elsewhere? So you'd get a list that you need to fill the needs of by a certain day. Put all the items you crafted for it in a shipping crate and you get a bonus if you managed to get all the items in it on time (it then gets taken away). That way you not only have to deal with customers, but also try to fulfill orders outside of working hours so that there's less making stockpiles for keeps.