And I'm assuming to make copies, you would need to use a glitch of some sort? (I run Skyrim on the Xbox...)
Yeah, mannequins.
Briefly:
1) 'Open' mannequin.
2) Put apparel on mannequin.
3) Stay in Mannequin's menu.
4) Remove apparel.
5) Exit Mannequin's Menu.
6) Exit house.
When you return there will be a full set on the mannequin. Be advised: this can mess up the displaying attributes of the mannequin and the pieces of the armor will continue to spawn as you remove them on subsequent trips.
