Consealed shower unit - can you help identify it

[a-smith]

Hi everyone, I cannot find any branding on this consealed shower unit I need some spare parts for, including a thermostatic component. I suspect it was bought online though. Any ideas? Don't want to have to replace the whole thing if I can help it.

 

[jtsplumbing]

Send photos to either Shower Doctor or Bristan they maybe able to help