Hi @FlipperJeans470. I started off wanting to get the look and feel of the buttons as close as possible to the original. My first problem though is not having had contact with one of the original units!
Off-the-shelf I’m not finding a lot. These from Apem/Mec will do the job (or maybe some of their others) although they’re a bit pricey for what they are (a button with an LED in it!), or these from Shanpu in China, again buttons with LEDs but also, who wouldn’t want a rotary control with an LED screen in it!? I’ve had free samples from Apem/Mec and got a very quick email enquiry response from Shanpu just last week.
I’m becoming more convinced about buying cheap buttons without covers and designing my own covers and 3D printing them.
Hope that’s useful and good luck with the project.
Paul.