Trim problem

[C21pryce]

When replacing trim motor found
Small plastic piece floating in reservoir
The piece was a little chewed up I put it
In place but it didn't stay in place. Where
Can I get a replacement. The piece
Slips over shaft of trim motor.
Really would appreciate your advice.
Thanks

[boats.net]

You didn't say what motor it is but look in parts listing to see if part is available.