Need help identifying shower cartridge home built in south florida 2004

[Chrislrl]

Hi all, attached are all the pics I've been able to take from every angle of my shower cartridge/stem.
I would love to be able to refurb my bathrooms while avoiding replacing my shower valve. I have two tubs with the same setup.
Please help! The shape of the crown is super distinct and haven't seen any model even close to resembling it. Sort of looked like a Mixet valve (but the house is way after their time) or a Price Phister, but didn't find any matches.

There are no logos/names anywhere besides the "ED or EC" that's inside of the tub handle.
The back plate of the handle says "made in Vietnam" so I imagine it was replaced at some point maybe.

 

[GReynolds929]

Does the chrome sleeve come off so we can see the cartridge? From what I can see it looks generic and will probably be difficult to ID.

 

[Sponsor]

 

[Jeff H Young]

trim could be vietnam valve could be elsewhere , might have a plumbing supply nearby that can help or more pictures of the rough valve could help or @Marlinman could help?