If you are wanting to design your own please first find the model of the Nimble at
http://www.thingiverse.com/thing:1843195/#files Design your model and come back here to submit it so that we can let others know about it. Or you can contact us and we will take care of the distribution.
Make a request for an adapter to setup the Nimble on your printer, if you can supply links to any data sheets it will help make it happen faster.