Reinbeau
Deeply Rooted
Mints actually do their main reproduction via runners, many don't set viable seed. I've seen mints grown together in many an herb garden with little problem other than the strongest grower will overcome the weaker.
I have stumbled onto this source which I felt was good info and supply.
you are Sooooo Lucky to live close to Richters
I plan to purchase from them for my Herbal tea garden. Of course will include severial mints.. :watering
My favourite is Corsican Mint:-