Where to buy this bevel washer?

[Art Page]

I can't seem to find a source for this bevel/cone washer. Tried all the box stores, a local plumbing supply house and online search with no luck. It's for a faucet supply line...should be pretty standard...so I thought! OD=3/4", ID=5/16
Need qty 6 of them.

 

[Twowaxhack]

Replace the entire connector.

 

[breplum]

Throw away flex connectors unless they have metal nuts. Plastic cracks readily.