I just picked up the Plain Jane leather tool pouch from Carolina Leather Works [http://www.carolinaleatherworks.com]. I just mounted the bag to the from of my bike. It attaches right to the crosbar for the highway lights.
This is the tool pouch, it's only $19.95+5.95s&h. I ordered it Sunday and I put in on the bike Thursday. I think I'll dress it up a bit with a Yamaha Star Concho. My tools (2 cresent wrenches, 1 3/8 ratchet, 2 metric hex key sets, 1 metric ratchet set, 2 philips screw drivers, 1 driver with 2 dozen bits) all fit snuggly. They won't be rattling around up there.
This tool pouch will give me back some room in my saddle bag.
Get bagged at Carolina Leather Works!