I searched Yahoo groups and could not find a group specifically for the Crown Jewel. You might want to join the homequiltingsystems group, though. This is a large and active group of quilters using a wide variety of frame setups to quilt. Someone on there will have a Crown Jewel, for sure. Here is a link to that group:
http://groups.yahoo.com/group/homequiltingsystems/
In the upper righthand corner you will see a search option if you want to look for other groups.