I realize they are not complicated to make. I don't want the rectangular box ones.
I would like to confirm the ones I've pictured were not home-made fab jobs and actually were produced by a known manufacturer. I suspect they were, just need to fine the right old speed catalog. If I can id what they are, it will help me locate a set.
I'm trying to keep this "historically correct" and want to use as many doccumented parts as possible. Thanks!