Wanted- JRC Chair Pull Out Locking Knob

[Mike Window]

A real long shot but I have a JRC chair which has lost one of the two pull out locking knobs.
This is the green one with the plastic cap that can be unscrewed. I have black ones fitted to another JRC chair but these do not appear to be able to unscrewed.
If anyone has a broken JRC chair with the green removeable cap please let me know. It is just the locking knob I require.
Mike

 

[Nicholas Cole]

Could try this guy

 

[Mike Window]

Many thanks Nicholas
Will try
Mike

 

[Mike Window]

Thanks Nicholas but they couldn't supply me with one so I am still looking
Bump

 

[Gary Mills]

Could you not just screw a nut or two onto the thread?

 

[Graham Elliott]

Mike.

Is it one of these stops. I have two Nomadic chairs. Can't seem to release these though if they fit.

 

[Mike Window]

Hi Gary it's the entire 3 pieces I am missing as shown in the photos not just the plastic cap.
Thanks Graham the black ones you have do not come apart so cannot be removed from the chair.
The green ones can be removed very easily just by unscrewing the cap. Thanks for trying.
Mike

 

[Bob Watson]

Try these guys!

 

[Mike Window]

Hi Bob
That's the same company Nicholas Cole suggested but they don't have the [part.
Thanks anyway

 

[Derek Funcks]

What about our resident genius engineer, maybe he could knock you one up, not mentioning any names like

 

[Bob Watson]

Hi Bob
That's the same company Nicholas Cole suggested but they don't have the [part.
Thanks anyway

Sorry, I did see the post but missed the details