Hi Adam,

Jaycar Electronics actual own the copyright to that project. Certain they would pursue legal action if an inferior (copied / similar) product became available. Some may argue that a similar product with some unique character would fall under the Creative Comms act. http://creativecommons.org/

I don't recommend doing a project like this and trying to sell it. The director of Jaycar is a very rich, powerful & highly persuasive man (From what I've heard). Not a good idea bud.