Hard to find seat

Hello,

I am trying to locate the seat that goes with Union Brass Stem 22-3245.

Here's the stem:
http://www.faucetshark.com/Union-Brass-Stem-22-3245-p/kiss-22-3245.htm

I have tried all my local plumbing stores, but can't locate the part. I have also tried googling it extensively, but can't figure out the part number. Any suggestions on where to go next? I need one for sure, but would take as many as four.

I have attached a picture of the seat in case that helps someone identify it.

I appreciate the help.

-Chris

when I did repair work, if they did not have it. you could not get it.

try these guys. they cater to repair plumbers

http://www.arender.net/contact.html

https://www.noelsplumbingsupply.com/

Eric at Noel's should be able to find it for you. If not, its not available any longer