Cant find replacement bakelite/ plastic 5/16" grommet for WE 20-B transmitte cup

[rfkimba]

Hi ,
I recently acquired a WE 20-b restored phone. The black plastic replacement grommet was loose and got lost. I tried Phoneco and Old phone Works but none were to be had. Any suggestions on where to find a black plastic grommet to fit the 5/16" diameter hole in the back of the  transmitter cup?
Thanks,
Bob Farber

[poplar1]

Ebay seller oldphoneshop has repro grommet set--one for base and one for the transmitter bell

http://www.ebay.com/itm/200906028076