Hello,
I’ve spend hours on the web too find those type of knobs (attacht).
they are built in this nice soft touch plastic and they have less than 12mm of diameter at the bottom.
anyone knows a place to find them ?
Question is where did you find them?
Did you try “Re’an”? They’re a related company to Neutrik. Try googling “re-an knobs” for a start.
Stryd, they where furbish with my mb4 and my Terratec PHASE 26 usb sound card 
so they are in use, but I need another 18 of them.
neb is right, they do look like re’an knobs… If the website fails, maybe you can contact terratec or whatever an mb4 is 
Is it my sight or there are 2 different knobs on your pictures
Frist one must be Rean P675
Second one, with grove at top looks like Sibalco 3/03
Thanks to all I found the Rean P675 Knob on mouser.com and they seems to sell them with no minimum quantity
Yes, but they are not on stock. I wanted to use same ones for my x0x project. 
So, what about the Sibalco knobs, was I right? Do you need those also?
The Sibalco seems to be those of my mb4, but the rean P675 have the best bottom diameter for my needs…
I can wait 8 weeks
Well, it want be full 8 weeks, they are out of stock for some time.
Base diameter of P675 is only 10.5mm (mouser say it is 11.5, but I believe Reans datasheet), and beside they are soft touch thats the main reason I`m interested in it.
How much do you need of those? Maybe we can do batch order if people like them for my version of x0xb0x.
I want them anyway for mine, and some other MB projects because of small dimensions.
Oups sorry, I have already order them, I needed 20 pieces.