I like this hoop lap stand. You can find some of the smaller sizes on overstock.com and others on amazon too.
I think mine is 10 and 14 in. or so. You can use it either way, dismantle it for travel or use one by itself without the lift. They are non slip and don't wear like the wooden ones. No I am not affiliated with them. lol
http://www.nosliphoops.com/lap-stands.html