I'll probably just go by the dealer and see what's in the parts manual, in case it is an odd size o-ring or something.

I have indeed been fighting this a while, as it does not always occur, yet when it does, it is only overnight after a fill up. I can fill it up in the morning and leave it all day in a hot parking lot and have no problem, then drive 3 miles home, and overnight, I'll smell gas outside the car. And of course it normally happens when I can't take the time to see where it is coming from, though I did recently have time and pinpoint it to the fuel pump.It's not big leak, never hitting the ground, just smelly and of course it's not safe.

I replaced the fuel pump to tank seal, and it did not fix the problem, and the tank had no defects that I could see. So it is either the o-rings, or the pump itself has a problem. Still it's odd that it only happens overnight when the fuel would contract from cooling, and so far I've not had it happen during the day when you'd expect the fuel to expand and possibly leak.