7-11 has a Customer Feedback Form on their website
Post# of 75002
It took me all of two minutes to answer a few questions and post this:
"Would you please carry the Rocky Mountain High Brand iced tea and energy drinks!
I buy them online from Amazon but would much rather buy them by the single can from my local 7-11 store.
Thanks"
If some more people from here would do this today it might get their attention.