I've been looking for an affordable source for about three years. I'm not the type that is willing to pay 50-100 US$ for a small tuber, and my patience was rewarded. Troy Davis is a keen Araceae-addict from Indonesia, and he takes trips through the Islands there every now and then. On one of those hikes, he came across villagers that had dug up an adult A. titanum with matured infructescence because they were developping the land for agriculture. Troy bought some seeds from them and after a few posts on various forums he made them available to the general public for the very acceptable price of 10US$ a piece (If you consider that includes the phyto papers, he didn't make much money out of it). I bought 6 seeds, read the sparse info on how to get them started and I now have 6 seedlings (the picture shows the largest, which
is currently developping a leaf). I know I won't be able to keep them if you consider the leaves roughly double in size every growing cycle. I hope to be able to get my investment back by selling 2 tubers, and I'll donate the remaining tubers to the Botanical garden here in Ghent (Belgium).