From the 'I didn't know that existed' department: EditorsKeys: Little stickers with the shortcuts for Pro Tools and Cubase. Certainly cheaper than the Pro Tools Custom Keyboard, which is $250. LogicKeyboard do a Cubase keyboard for €109.
Posted by Tom Whitwell.
Incase it is of any interest to you, a while back i found a british labels company who print many types of sticky labels for a really low price, if interested may be worth taking a look at their website.