Ullman Loom Jack Hooks

When I purchased my vintage Berga-Ullman jack loom, it was missing several pieces, and these were the ones I simply couldn't find replacements for. So here's my best stab at a design.

If anyone has pictures of originals that they'd like to share so I can improve the design, it is very welcome. I have installed them on my loom at they work great, but I'd love to keep chipping away at the design to make it better.