I used something like this:
http://cgi.ebay.com/ebaymotors/HoT-rOd- ... ccessories
But mine was only an 8 circuit set up. It needs a couple of modifications to work correctly, but I don't think anything major. It does not come with all the wire you need either. Figure another $100 in extra wire (connecting lights, switches, grounds etc) and terminal strips.
This is what my Manx looked like when done:
