Lionheads on not yet a recognized breed. While it is being worked on, it is a long process that takes years. Since they are not recognized by ARBA yet, they are not listed on the website.
There are breeders out there. You may find some local ones through local breeder clubs. Even if there aren't any listed on the members list, you can always e-mail them and ask if they know of any in the area (be sure to include your area if you don't live really close to where the club is based). Even going to a show can be good to meet breeders and see if they have anything for sale at the show.
If you aren't looking to get a show rabbit (you can show lionheads, but they can't compete for Best in Show), you can see if there are any in local resuces or online ads. You never really know what you may find.
