Jason says, "You could pair either of the above with a meditation under-cushion—particularly with the bench, as it will spare your knees. A folded blanket or two will work, too. (Note: I haven't tried the specific model linked here, but have used others extensively in Buddhist meditation centers.)
NOTE: Meditation padding and props are a matter of personal preference. You don't necessarily need to get everything listed above—just what makes you most comfortable."