Welcome to All Things Plants, Daylilylady15 !
If you click on the photo that Donald (Needrain) posted, it and then click on the plant name at the top, it will take you to the entry on the ATP plant database; up at the top, click on "3 members have this plant" and you will see 2 members listed that are offering the bulbs/plants for trade/sale; you can contact them via "Treemail" and possibly obtain some that way. You also might want to post a message in the "Classifieds and Group Buys" forum, something to the effect of "in search of Air Potato."
Hope this is helpful !