Bethesda needs to get off their ass and republish these games. It was agreed that they would have the rights to sell and distribute the old games as of jan 1st, 2014. There excuse it that they were still dealing with legal papers. Most likely it is low priority since they dealing with eldar scrolls online or they just want to bury the games promote 3 and fallout 4.
Buy it Amazon, or ask someone on No Mutants Allowed for help.