If you have a personal dungeon, then you need some furniture for it as well. Making your submissive building furniture for you might be a bonding experience, doing it yourself might be an ego boost.
But if you don’t have the time, then you have to buy your furniture from professional builders.
Toys4Lust has built a device they call “The Trap”. The unit is 10″ high, 20″ wide and 48″ long with the leg and neck stock and can fit 4′ to 6′ feet subs and up to 300 pounds. The leg stock pivots forward and back for all kind of positions and even moves up and down 6″ for the long legged sub. You can remove the head stock for all kinds of table play.