I believe it to be the only set. But there is that item duplication glitch for armor, check on you tube if interested
1) Place the pieces you want to duplicate on a mannequin.
2) While still in the menu: take all the pieces off.
3) Exit the house.
4) Reenter the house and the full set should still be on the mannequin.
Be advised: that this can mess up the displaying of armor because some or all pieces will always be on the mannequin and mix-n-match with the set you're trying to display.
Also, any duplicated improved/enchanted armor will be 'normal' when you recover the copy. The original will be unaffected, but the copy will be 'normal'.
Edited for punctuation.