I'm after the slope, not the wood, so the wood shouldn't be pretty or even salvageable. I'm going to strip it right off to use the underlying structure as a pattern for an improved unit.

Using a scrap unit allows me to leave mine in the car during the process, and negates worries about damage.

So, dirt cheap is best. All it's got to be is in one piece and the proper shape.

If I can have two, that would be even better.