portable dvd player with undistorted zoom ?

me too. i'd like to find a portable with zoom for all those old letterboxed widescreen dvd's in order to use the full display resolution. the sony fx - 970 has a zoom but it distorts the picture. i've got a small, lo-res sylvania player with zoom, but it stretches 4:3 to fill the screen whether you want it to or not.
i'm amazed that with all the older letterboxed dvd's out there there don't seem to be any players with a zoom to utilize the whole screen.