Shower Valve - Damaged plastic internal cog

[rubybish]

I have a damaged shower valve in my, new to me, home.
Two of the tabs on the end of the plastic cog are broken, meaning the temperature handle does not stay on securely.

I can't see any model designation on the fascia.
Anyone recognize the brand?

Or are these plastic cogs potentially generic?

 

[oldbuffer]

1. They are not generic but maker / model specific.
2. Send the photographs to showerdoc.com and see if they can help.