http://www.generations-quilt-pattern...osh-quilt.html
If you go to this web site and scroll down a bit you'll find a much larger picture of the blocks. Get some graph paper and draw it out. It doesn't look like it would be that hard to draw out and then just make your blocks whatever size you want. The smaller they are the more you're going to get the "Oh My Gosh" effect.
Hope this helps.