I am also a fan of the binder. I would suggest going on Amazon and buying them on there, much cheaper than the official playbill binder.
Avery Mini Durable Binder for 5.5 x 8.5 Inch Pages, 2-Inch Round Ring, Black, 1 Binder (27554) https://www.amazon.com/dp/B0006HV8V2/ref=cm_sw_r_cp_api_-00vxbSMA96M5
Avery Mini Diamond Clear Heavyweight Sheet Protectors, 5.5 x 8.5 inches, Acid-Free, Box of 50 (75201) https://www.amazon.com/dp/B0006HVCZO/ref=cm_sw_r_cp_api_XZ0vxbJP65XHX