LNG is not readily available as an automotive fuel in North America and is most commonly available in California to the public.  LNG may also be supplied by cryogenic gas suppliers:

The alternative to obtaining LNG from a supplier is to manufacture it on-site from pipeline natural gas and there are a number of companies that can provide this equipment.

Cryogenic Fuels Inc. is the only company that offers a Two Line Fill Procedure, which has several significant advantages over Single Line Filling and avoids many of the issues associated with LNG.