Thanks for the idea Thomas. But alas, the Quest does not show that part. The gun started making a really loud metal to metal grinding noise when cocking. After removing the stock I could see where the cocking lever - at the joint - is rubbing the underside of the compression tube and making deep scratch marks. From looking at the diagram I think this part serves as a kind of glide to separate the cocking lever from the compression tube. I made one out of nylon and got her back to shooting, but would really like to have an original (proper) part.
Come on guys, help me out here.
Thanks,
Gary