Mercian will set you right up!

There was a bike shop here in Austin that was popular among roadies. Lots of square footage, and a seemingly endless supply of weird old parts. I started shopping there in the 80s, when I was in college, and they had, among other things, three Mercian frames hanging on the wall. The shop closed about five years ago, and I'm pretty sure two of those were still on the wall when they closed (I have to wonder if their unwillingness to mark down old stock was part of the problem). One of them had that barber-pole seat tube.