check out
www.zex.com
The kit comes with a trunk mount for the bottle. There are several choices on how you might want to secure the mounts. (Bolting, welding)
My mount screws are welded into the trunk.
Be sure to get the in line pressure guage, and if you have the cash, a bottle heater and remote bottle opener. I can't tell you how many times I've pulled up to race instigators with my bottle closed... ARGH!