I don't know if you're looking for an original, but this guy's making sweet Palantir replacement mods, and says he'll have more stock in August:
https://pinside.com/pinball/forum/topic/palantir-eye-of-sauron-crystal-sphere-mod-for-stern-lotr
Here's his Pinside shop (not showing any in stock but he says at the end of the discussion thread linked above that he's working on that):
https://pinside.com/pinball/market/shops/1227-williamson-pinball-mods/02988-palantir-eye-of-sauron-crystal-sphere-mod-for-stern-lotr