Welcome to HealingWell!
You've come to a great site with lots of info. I'm sure you'll be able to find even a little something to help you in some way. The calcium is already a great next step. You said you've tried Questran and it didn't work - how about
Welchol? It seems lots of folks on here prefer Welchol to Questran.
You can also find a lot of dietary tips here. If you haven't already, you may want to check out the thread The Definitive Guide to Gall Bladder Disease
. It's a long thread, but very informative.