The Edge diner (former Edgemere Diner) on Rt 20 in Shrewsbury, MA, has gone into the rootbeer business. I bought my bottle at a hardware store as an impulse item. At $2.25 for a single serve glass bottle, it is a little pricy, but IMO, worth the money. It is made with real sugar, and less carbonization, so it has a home made taste.
According to the hardware guy, it has sold ok. I think that it is actually made at a contract manufacturing company, and not at the diner.