C.J.
We have a Phillps player from Target. It's almost ALWAYS on sale and it runs around $50.00. I bought the extended warranty, portable dvd players tend to break and the warranty is super cheap.
I do know there's a shelf attachment that attaches between the headrests for the free standing models. My sister has one for her car. Works great and the kids don't have to hold the dvd player the entire time.
I don't know where so got it and she's a work right now, otherwise I'd call her.