Get a cigarette lighter extension or one that splits into 2 adaptors. You need to preserve the cigarette adaptor end on your accessories as they convert the 12V down to 5V or so. Cut off the end of that extension and hook it up to one of these:
http://www.google.com/products/catal...wAQ#ps-sellers
Make sure you get the smaller one as the fuses are the small versions. Land Rover uses a 15A fuse for the cigarette lighter, you would probably be fine with a 10 as each accessory probably only draws and amp or two. There are a couple extra slots in the fuse box, just make sure you find one that turns off with the key (use a multimeter to find them). Ground the cable with the bolt next to the box.
Kevin