All three systems require unique tanks, distribution systems, and carburetors, though nothing has to be invented to use them in production vehicles.
Natural Gas vehicles have been available straight from Honda for many years. Look up the Civic GX.
And the LNG should get used up before it gets above cryogenic temperatures. That's why it's more suited for dual fuel tractor trailers. You fill up with both LNG and diesel, and run off LNG until your LNG tank is empty, then run off diesel until you get to another LNG fuel source.