Keyboard Tray

I am looking for a keyboard tray.
I need one that will attach to the bottom of a wooden (or fake wood possibly) ikea desk.
I don't care about ergonomics, i just want my keyboard a few inches lower (and hiding it away will be nice)

recommendations?
to fit the aluminum apple keyboard w/ numeric pad and possibly a mouse.

looking to not spend a ton either.
anyone ever made a tray?

 

thanks! i will