Monorail Teal was rebuilt from the two crashed monorails Pink and Purple.I thought both trains were rebuilt after the accident. First the good ends from each of the 2 were merged into a train, and then salvageable parts from the damaged ends were combined with new fabrication to create an entirely new train, which took several years to complete.
Monorail Peach was built by Disney in 2011. So 14 trains total over the life span but they’ve never had more then 12 at a time.