If you want Western mysticism it is hiding in Hermeticism. A watered down (more palatable to the masses) version is contained in Blavatsky's The Secret Doctrine, and Rosicrucianism. Too xtian-based for me, just as kaballah is to jew-based, and Sufi is too islamaholic....but for one that can tolerate the stench of Abrahamic-based religions, it could be worth a look.