Adnerson power products(the people who make the battery connectors in the kit) sell some stuff you might be interested in. Newark is a distributor, so they are FIRST legal.
http://www.andersonpower.com
Btw. What exactly are you tryign to do? If i knew a little better, i might be able to suggest something a little more specific. Are you tryign to mount all your speed controllers etc on a single quickly removable plate?