Where can I find parts to "legally" convert my 2005 Dodge Ram to bifuel? The EPA went sort of crazy in 2008 with all these new certs. Preferably to CNG since LPG looks like it's going up in price. Also, do I need someone to install it so it's "legal" or would it be OK if I did the work myself? I live in California so I imagine it might be somewhat backwards to go about this here.

Thanks!!