I bought my OEM cover from another member. It had been on his truck a for a month, before he put it in his garage for storage, looked brand new. he gave me a spare key to open it (wasn't chipped, so I couldn't steal his truck). I drove about 2 hours to pick it up and paid him 500 cash.
The stealership wants like 1100 for these things, and if you can get one new, I would offer at least half of what dealership wants if it is in fact New in Box. And keep in mind if the seller has to ship that's going to be about 100 bucks minimum, even if shipped via GreyHound bus, so you'll need to account for that.
Good luck. That's by far the best item I have purchased for my Trac.