A follow up to let you know what I found.
The NAPA guy had a set of Metric O-rings. They are different in ID/OD and thickness.
They do not look at all like the hardware non-metric O-rings.
The ones that fit were:
"8 ID x 12 OD x 2.0Thick"
and Napa PN 727-2605
just under $2.00 for all four.
