JuliaRav4

I like my Rav4, but the visibility for a short driver isn't that good, and the headrests totally block my view. Has anyone ever replaced the headrests with something lower profile? I've been looking on Ebay, and I see that there's a lot of configurations to consider, such as the size and spacing of the pins, and where the notches are (if considering other makes). Surely other people have had this problem? I would like to buy used.