Jaipur Homme might be an alternative but it's a lot spicier than pi (although very well blended), and the vanilla is still pretty synthetic. You could try some of the more expensive niche offerings like Spiriteuse Double Vanille, which is famous among vanilla fans but insanely hard to source.
Personally, I think Serge Lutens's Chergui, which is very smooth and soft amber with various sweet oriental notes, might be to your taste, and it's not too hard to sample either. There are also a ton of good niche ambers that are worth investigating, like Ambre Precieux, Ambre Soie, or L'Air du Desert Marocain. Hope this helps.