check this page out... these guys are out of Ontario, Canada:
http://www.backyardrink.com/snowboardpuckboard.htm
here's there prices for 50' rolls of 1/8" puckboard
ROLLS 50' long and either:
4" wide ea. x 50' @$22.95
6" wide ea. x 50' @ $39.95
8" wide ea. x 50' @ $49.95
12" wide ea. x 50' @ $65.95
Thickness is approx. 1/8 "
I would love to build a rainbow rail using this stuff.