Suspended ceiling tiles (St. Albans AL1)

I have a project to fix a suspended ceiling in my workshop. I have fixed all the supports ready for the ceiling tiles. Just wondering if anyone has some unwanted suspended ceiling tiles (Standard size 600mm x 600 mm). I will need about 50, preferable relatively undamaged. (but will take a "job lot" if you want to get rid of more!) Thank you. (Peter).