Weekend Bump. Do these boards get a lot of traffic from outside the community?
these get more traffic with the word "bounty" or something like that.
but you haven't made an offer. make up a price you are willing to pay if you don't know what the cost to them might be.
then if you still don't get any bites, add a finder's fee on top of that to anyone who will take the initiative to go find a starbucks employee willing to do this.
one problem might be that each box of concentrate is marked. if you happened to be a starbucks operative determining if gray market selling is occurring, then those markings would identify the store and their employees might like to actually, you know, keep their jobs.
but start with making an offer and maybe someone will consider it.