In the book, Making Poor Man's Guitars, author Shane Speal utilizes readily available guitar parts to build modern versions of Depression Era style instruments.  Below are links to the essentials.  Some single listings have all the parts you need for an entire instrument.  Others have individual parts.  Most links are to CBGitty.com, the online retailer where Speal personally gets all his parts. 

Full Kits Based on Projects from the Book

Essential Parts From the Book...