This is wiki, add or correct sources as needed.
Some sources of these perpetually hard to find pots, often out of stock, keep looking:
- Amplified Parts (USA) / Alpha / https://www.amplifiedparts.com/products/potentiometer-alpha-linear-9mm-vertical
- Modular Addict (USA) / “comparable to Alpha” / https://modularaddict.com/parts/9mm-potentiometers
- Mouser (global) / Alpha / https://www.mouser.com/ProductDetail/Alpha-Taiwan/RD901F-40-15R1-B100K-00DL1?qs=1mbolxNpo8czbLgndpJJVQ%3D%3D
- Small Bear (USA) / Alpha / http://smallbear-electronics.mybigcommerce.com/alpha-single-gang-9mm-right-angle-pc-mount/
- SynthCube (USA) / Alpha / https://synthcube.com/cart/alpha-9mm-potentiometer-right-angle-pcb-mount-6-35mm-round-shaft
- Thonk (UK) / Alpha / https://www.thonk.co.uk/shop/alpha-9mm-pots/
- Tayda (Thailand/USA) / Alpha / https://www.taydaelectronics.com/catalogsearch/result/?q=A-1848
Or try
- AliExpress (search)
- eBay (search)
If you have to you can get by with the no-threads ones. Then you may have to mount the PCB to the panel a different way, e.g. by drilling holes for standoffs.
If you’re trying to search on Mouser, don’t click “PCB mount”. For some reason they have these listed as panel mount.
Also see this topic:
https://lookmumnocomputer.discourse.group/t/9mm-vertical-b10k-b100k-pots-switches-for-sale/1807/8