I am not sure which shower you have can you possiblysend us a photo of the shower you have
No the knobs are specific to each model
If you have the 88 then I would suggest a service kit for the valve so you can give it an overhaul and a new knob pack.
This link shows what is available if your shower looks like this.
http://www.showerdoc.com/mira-parent-47-mira-gem-88---built-in