I was recently given a used table as a birthday gift. Unfortunately the playfield is sagging badly. No manufacturer, model number or serial number anywhere on the table. I took the playfield out to get dimensions. It's 48 X 26 1/2 x 3/8 particle board with green laminate surface. I would like to replace the playfield but have no idea who manufacturers the playfield. Any suggestions how to proceed? Thank you in advance for your help.