If you have heard of mycngkit, they are the main ones that sell the best kit out there - the kits Galileo of Argentina makes. Mycngkit USED to be the main distrubuter in the US, but another company ( CNGOutfitters.com) took over, since I heard they were not delivering some orders, and taking him 2 months to get them ordered and delivered.
CNGOutfitters have upgraded the kits so that they are useable on US cars. They provide installation as well as support. They have a couple thousand kits that will be in the US within a couple weeks, but I imagine they will go fast. They will also be setting up distributer ships through NAPA and other service locations.
There is also technocarb. They are well established and have a lot of distributors that can help.
Make sure you get the correct tank. Some are dangerous and should not be used. Make sure they are DOT stamped and certified. The tank is the most difficult part of the system. They are extremely safe (NEVER blow up), but they have to be mounted properly.
Installing a kit by yourself will take around 30 hours. If you are somewhat comfortable working on your car, you can install it. If you can't change your own oil, have it installed.
