Well, you can get a new Mercian in your size as well! I guess it depends on why you want the 1950?
I know two individuals (there are also one or two on the List) who ordered new Mercians and they are very pleased, both with cost and product. You can also have your new Mercian "customized" to almost any extent you want........
Unless I just had to have the '50 model, I would order a new one exactly the way I wanted it and just wait. The two people I know waited nearly three months for their Mercians, but it was well worth it.....pretty reasonable as well!!