Well, frame numbers are 7 digit but the series starting with 2000XXXX lists the male connector...
17710-881-840ZB as unavailable.
Item 1 in link below.
So, that little trick won't work.
You might take a VERY close look at the Oring you found dislodged and make sure it doesn't have a nick in it or the area where it fits isn't damaged in some way....thin, I know, but I'm trying.
You could try a fitting set from an 8D because they both ARE available. It's something I've thought of doing before but have NEVER tried it myself. Here's the parts pages so you can see for yourself: See item 2 in link below for the male portion
Part number 17710-ZW9-033
See item 8 in the link below for female:
Part number 17650-ZW9-023
Beyond doing that, you might try shopping aftermarket suppliers to see if there's anything "universal" available for solving this problem. They may have something and it might be less expensive.
Even sites like Jegs and Summit Racing might have some sort of "out-of-the-box" solution. Quick connect gas lines aren't common for most things except outboards.
I have an excellent hydraulic supply shop in my little town and I might try them for ideas if this were happening to me.
Sorry I couldn't find you exactly what you need.
Good luck.