My table is about 36" tall, but I used an ordinary door for the top. Regular doors are 80" tall, which is longer than you want, but it can be cut down. It also adds 2" of height. It's already very smooth, but I covered it with flannel-backed oilcloth from Joann. Old post here, if you're interested.
http://sceneinthepast.blogspot.com/2012/07/sewing-room-with-bonus-table-tutorial.html