trouble selling sourced items

I run a daily pickup run to the dc everyday and pick up specials for commercial and retail customers. For the retail customers we have been using the suggested method of finishing the invoice and placing it on hold by putting a zero deposit on the item. If your customer wants to pick up the part the same day you cannot use the reference number and just release the held invoice. The computer will not release a sourced invoice because it has not received the asn yet,( which will come down tomorrow morning). This needs to be corrected, why can we not have an option such as sell anyway button for these types of situations. There are far too many controls on this damn thing. Carquest is obviously worried than an employee may take them for five cents!