I used to be the guy dumpin those plastic bed liners. They are junk, in fact I talked my friend into takin his out tonight haha...
You DON'T want it, they scrape the paint bad, look cheesy and did I mention they scrape the paint!?
If you still want one, you can go to your dealer, find a friend that wants to get rid of his, call around to spray in bedliner dealers, or any other aftermarket shop...