Winnicookie there is a company called U.S. plastics that sells UHMW (ultra high molecular weight) plastics strips. I don't know if they only sell certain common lengths and widths or can custom cut to meet your needs. Another source for plastic is to contact a local ice rink and see if they have any used "Puck Board" usually yellow plastic at bottom of boards on multi=use ice rinks Hockey/ice skating.
Steve