Help identifying part??

[yellowjacket]

Hey everyone,
Hoping you guys can help me out identifying a part. It's essentually a puck that fits into the frame and a bolt goes through it. See attachments. two of the pics show one that is currently in the scooter and the other is the hole that the missing one goes into. The scoot is a chinese 3 wheel articulating scooter that is no longer sold and direct parts are not available. The mount thats missing is to attach the exhaust. This fell out, and as a result the exhaust bounced around and broke the weld on the exhaust pipe. Anyone have any clue as to what this "puck" is offically called so I can look into getting a replacement that would fit? Any and all help is much appreciated!!

-Yellow