Hey Rob,
Hit me up on skype anytime and I will walk you through the various ways to make interiors. If you can video chat and we arrange a time when I am at work I can show you examples of each interior and how to build them.
As well I can help you with any other questions you might have. Regarding the hardware I am happy to send you enough to do a case or two if you pay the shipping. Probably about $25. BUT you might want to shop around on the web as well or hit up your local Tandy store if there is one.
On skype I am jbideas