I used drawer slides from Orvis to build a sliding shelf for the generator for my car hauler. I didn't pay the extra for the locking slide. Rigging my own lock was easy.
http://www.ovisonline.com/Drawer-Slides-C4.aspx
https://photos.smugmug.com/Other/Shadow-Trailer/i-rHPR2xF/0/1280/IMG_2355-1280.mp4
http://www.ovisonline.com/Drawer-Slides-C4.aspx
https://photos.smugmug.com/Other/Shadow-Trailer/i-rHPR2xF/0/1280/IMG_2355-1280.mp4