Just a couple tips. Call them (or stop in) and find out what nights their trucks come in (my local one gets new stock Wednesday and Saturday morning, though it has changed recently). Most of the time, the stuff listed on the shipping manifest will not show up in the computer until the night before, so call them in the evening before the truck arrives and say "I was wondering if you had a minute to check the incoming manifest for item #354815 (Grimmy's item number). General sales staff won't know or care what is coming in on the truck, but I have found that 90% of them are pretty damn useful in checking the computer, especially with the item number (I used to use the UPC, but a couple of the employees didn't care for the longer number). Win or lose, make sure to thank them for their time. Good luck on your quest.