For the past few months, I've been smelling fuel every time I filled my tank. Finally did a search and found your note. I've had the work done to my car by a local garage. Unfortunately, the part wasn't available, so had to scramble to get a ride home and to work the next day.
Message is, if you smell fuel, it's probably the ring, and best to order the part (~$11) and have it on hand before the garage looks at it.