You'd have to take the old one and measure. I don't know the size off hand.
I have a large kit of Visteon o rings that I keep around. So I just match size and go.
OEM. I got one from partsouq. Mine is a cold weather and the fuel pre-heater was leaking causing issues. So I bought on without the heater. It's not cold where I live.
It's been a bit since I did the filter. Maybe my old brain just thinks it replaced both.
I'm putting a new hand primer on this weekend. Guess I'll swap oring just because.