I see what you mean about the cost. additionally, as it's an import from the USA, there is import tax and duty to pay. about 20% for starters. I'm going to have a good look here in Montreal to see if any interest. How does sheets of sorbothane glued together and cut to size appeal? From previous comments appears this may be too soft and not stiff enough. As always, you can request me to stop, but I like new approaches and ideas, just in case you had not guessed!
kind regards,
T.