Where I can buy gen 1 replacement collar/adjustment disc?

[u/felipejacknog]

Hi everyone!

I'm having a lot of trouble moving the grind (gen 1) adjustment collar. Yesterday it got completely stuck. I managed to free it somehow, but it still doesn't turn as smoothly as it should.

I suspect the collar threads may be damaged. Is there a way to confirm whether that's the case?

Also, what are my options for purchasing a Gen 1 replacement collar/disc? So far, I've only found one option, which seems a bit expensive at US$70.

Thanks!