Might be a bit harder to find as most shop girls take a fair bit of time to put their makeup on... and probably don't want to take the time to reapply!!
That said, why don't you message a few shops and ask? From memory, some shops advertise CIM +$30, COF +$50.. but as always, it's up to the girl but if you are upfront about it, you should get a few yes's.