Shower cartridge replacement - need to find this part

[Mikecast451]

Hello. Was wondering if anyone knows who’s makes this shower cartridge. The nylon stem snapped off in the shower handle. The shower valve itself seems fine so I’d rather not have to have it replaced if possible. I haven’t been able to find a replacement part at any plumbing supply house ,big box store etc. Any help would be appreciated

 

[Twowaxhack]

Price Pfister