Yes, and that's been done:
Existing in parallel w/ "Shapeoko the project" we have "Shapeoko the product", which is currently available from Carbide 3D --- while the Shapeoko 3 was made available under a "No Commercial" derivatives opensource license, none of the developments since then have been, and Sparkfun's Stepoko is only an SO3, pre Summer 2016.
Interestingly their page: https://www.sparkfun.com/stepoko has a listing for Limit switches which just links to their listings for micro-switches and associated components.
All of the above represents my understanding of the situation and legalities, it is not legal advice, nor is it an actual official statement by the company --- all I can do to speak for the company is do tech support via email@example.com and author some docs.carbide3d.com articles --- for any further details on this, please contact @edwardrford or someone at Carbide 3D who has the authority to make such pronouncements.
That said, if someone has worked up opensource files which are compatible w/ the license for the wiki (CC-by-SA: http://creativecommons.org/licenses/by-sa/3.0/ ) I'd be glad of them and will help to get them placed on the wiki.