Bathroom faucet stem and trim identification needed

Does anyone know which manufacturer and part number these are?

Assembled view:


Need help identifying the stem & trim for this leaky faucet:


Specifically having a hard time tracking down the washer which has a small lip to it:

Washer dimensions:
11/16" outer diameter
5/16" inner diameter
1/8" thickness without the 'lip'
The 'lip' is around 1/32" and is slightly wider than the 11/16" outer diameter.

Thanks in advance.