Need info on this little button.

Im trying to find some info about the button in the pic below.

its a sort of momentary lever which can be rotated left and right(as its shown in the pic) as well as pushed in (downards as its shown in the pic).
Its the kinda thing you get in MP3 players etc


I was hoping to find out the manufacturer and eventually somewhere to buy them from. But my initial search has gone quite badly, so any clues at all would be appreciated.

Thanks
John

they sell one like that at sparkfun:
https://www.sparkfun.com/commerce/product_info.php?products_id=8184

Datasheet located at the Link in the previous post.

https://www.electro-tech-online.com/custompdfs/2007/04/OS-1305.pdf