I stopped by my local Fastenal store and brought in my sliced up old o-rings. The guy said, yep we have got those! I was thinking great, this will help out in case I need more than just 2. We find the right size o-rings and I look at the package and right on the front it, it says Buna-N. I think, great this is the exact kind that came on my metal fittings. I see that it comes in a pack of 50. I was a little on edge to know exactly how much this was going to cost me. We get to the counter and it was a WHOPING $1.76!! I asked if that was for each, and the guy replied, "Oh no, you get all of them!" Now I am real excited to know that I now have lots of spares!!! And for only $$1.76
So here is a what the package looks like so you all have part number in case you have to order yours.
(http://i116.photobucket.com/albums/o16/fnjeep314/FuelO-Rings.jpg)
If we need any we will just order them from you :D
Well you all certainly know that I've got 'em!!