The good thing Gavo, is that I can make one to your needs. You could have a lead taking power (and turn signals) to the rear under the seat, and/or up to the front under the dash. Even with extra relays switching high draw battery power for powering driving lights etc.
This one is for Shiney, just need to work out the pricing and do up a connection chart. Due to wire availability, the colours codes are a bit different..