In addition to Painless Performance (which is very good), other good brands that have complete kits include American Autowire, Ron Francis Wiring, and EZ Wiring.
Determine the number of circuits you need, and they will probably have a kit that works for you. From a quick scan, it looks like EZ wiring has the lowest cost, 9 circuit kit that might be sufficient for your needs.
EZ Wiring 12 Mini Wiring Harness . If that still seems a bit pricy for your project, consider getting bulk GXL or
TXL wire and a fuse block from
Blue Sea Systems .
Shop for pricing, as a number of the lower cost vendors carry the harnesses and Blue Sea products.
Doug
