Counter Help Needed

Not Counter Help as in a Diner but one of those clicky counter things like a Bouncer might use outside a club to count how many people have gone in... Why does Salvage Chick need such a device you ask? To count how often I try to send people across the street to shop and they shrug "They're Never Open"!! I was trying to keep track using that little hash mark scoring system but I'm not always near a pen so I thought if I had a Counter on a chain around my neck I could get an appropriate count. Just so you know, Mack could see all the business he's missing while he's off at his 'Real' Job.