Call around to your local shops and see if any of them have the Kona color card. Perhaps they'd let you come in and look at it for the colors you need that they don't stock. I have the card, but I don't have any Fiestaware (old or new) so can't really help.
If I were you, to match 10 colors as exactly as you want, I'd spring for a color card of my own. They run around $20 at HoP and mine has been invaluable. Because of the wider range of color choices, I think your odds of a match are better with Kona than Moda and, personally, I don't like mixing the two because of the difference in sheen between them. Also be aware that color names means nothing, so plum Fiestaware will probably not be the same as plum Kona.
Kona really should just come up with a chart on their own that matches their colors with Fiestaware. You know, like the conversion charts for DMC and Anchor embroidery floss? I wonder if anyone has ever asked them to do that?
