Use the graph paper at
[
www.sweaterscapes.com]
for a truer stockinette stitch-to-row ratio if you want to design your own patterns. It's actually called "knitter's graph paper." Of course this works for any kind of patterns done over a stockinette base, not just Fair Isle.
Why not try your local library for Fair Isle patterns? Mine (a very small rural library) has several books on FI sweaters, mittens, socks, and hats. You can always see what's available at Amazon and order it as an interlibrary loan too.
I didn't go to the link you noted, so this idea may have been there, but check out the infinite possibilities of slip-stitch color patterns as well. They are lots of fun. Again, the library is a good place to begin looking. Any stitch bible will have plenty to get you started and then you can play with them on your own.