This is a very simple but working iambic keyer.

You can use the raw model files for printing each part seperatly.

It is made from very simple parts you should be able to source.

If needed, you can create different stands for your need or just modify the existing ones.

For assembly, you need a spring with about 10-12mm length with not too much tension.
You'll also need some M3 Screws of different length, M3 Press Nuts / Melting Nuts and cable lug that fits M3.

Any Questions? Let me know.