"Puck board" is also known as
arena board and is the plastic sheeting that they line hockey arena wood boards with. It usually is white, though I have seen it in black (more rare) and other colors, blue and yellow, come to mind.
They also use this stuff to line horse stalls, indoor soccer rinks, and snow boarders use it on rails to protect thier boards. You can try local home improvement places. Talk to the manager of the local hockey rink. He will know where to get it and probably cheaper than I paid for it. I have never paid more than $80 for a white 4'x8' sheet and think I got once black between $100 and $120 a sheet as they didn't stock it. I typically buy 1/4" to 3/8" thick sheeting.
Here are a few companies that sells it in a few different colors including red, green yellow and blue. I have
NEVER dealt with them but found it online for examples.
You may have to pick arena board.
SAN DIEGO PLASTICS - DENSETEC ARENA BOARD
| Arena Board
Orion Plastics, Our HDPE Extruded Plastic Product Line
Also if you look in the yellow pages under plastic in your area, some of the guys will that sell the plastic sheeting will now what puck board is.
edit I like it, as you can heat up the plastic (not to fast), bend it, leave it to cool in a vise, and it will hold the shape you bent it once it cooled. I use one of those blue bottle torches the plumbers use for soldering. Hope this helps.