The pipe that has the crack is the very first pipe coming from the meter - it is usually a part of the "meter fit" assembly - and has a 1 1/4" collar w/oring that attaches to the meter and a regular 3/4" male thread on the other end. This particular pipe has two 90 deg. bends in it, but I've seen meters where this pipe is straight or at a different offset. The important thing is that it has the collar that fits the gas meter.
Does anyone know of a plumbing supply (other than the gas company) that would carry a replacement? It is not a common item for any of the closest plumbing supplies I've checked, but I am sure it is available.