Almost all elephant trunk snakes are wild caught. The two you find in the pet trade are the pygmy file snake and the Arafura file snake. The pygmy one gets about 2-3 feet, the larger one 5-6. They grow and breed very slowly from what I understand, so this is probably why they're not captive bred very often- that, and fully aquatic snakes aren't very popular. The third species, which is from Australia, only breeds every 10 years. You just have to keep your eyes on the classifieds. They show up in 'Boas' and 'Colubrids and other snakes' (Of course, they are 'other snakes'). Importers in Florida will have them from time to time. As a note, if you like elephant trunk snakes, you may also like snakes in the subfamily Homalopsinae, such as the puff faced water snake and the tentacled snake. Sorry I couldn't be more help!