I had read that Harbor Freight press plates might snap and they did.
Cast iron fails without notice.
Priority mail flat rate box with 70 lbs of new press plates from Swag Offroad
link: http://www.swagoffroad.com/
8 1/2" x 10" X 1 1/2" thick steel, no more snapping cast iron.
Ready to go again. It only took two days from ordering to arrival.