Kits can be found @ www.hairballaudio.com, circuitboard @ www.mnats.net, all the rest of the bits and pieces need to be sourced from Mouser (but there is a one-click link with which you can buy all the parts, which can be found on the Hairball site). Lots of pages and links on these pages, work through them all and you should have a clearer idea of what's needed for the build.