Definitely sounds similar to my set. I have a lead on a junker chassis from a local VK member, which I am going to look at in a couple days. If that doesn't work out, I will let you know. Thanks!
I am amazed that within a couple hours of posting, I now have THREE potential sources for these 2 obscure 40+ year old parts lined up! Thought I would be looking for months. The power of the internet....