Anyone know where I can get these felt pieces?
They don't hold up to cleaning well. I've done a search here but didn't find anything despite having seen them mentioned before. 
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You can make your own if you want. Go to hardware store and ask for "packing-felt sheets" They come in various thicknesses. Or..at a local fabric or craft (Hobby Lobby) store (ask for felt sheets). From the hardware store get two "gasket punches"..one for the I.D..the other for the O.D. They shouldn't cost more than $8 to $10.00 each (cheaper then buying gaskets and shipping usually).
You can sometimes also substitute the appropriately sized "O-Ring" for felt. Not rocket science..just knowing where to look..what to look for.
Cheers..
Ichi
