found this a while back for the adventurous...sounds like decent results
Hey, that's my thing! If anyone has any questions about it, I'd be happy to answer them. That thread got really long and cumbersome. At the end of those trials, I came up with something I'd consider as good or better than D2. Flavor-wise it was really close to D2, but the color wasn't quite there. Beer I've made with it were more like La Trappe than St. Bernardus, in color and flavor.
The next thing on my list is to make a syrup that tastes like whatever they put in St. Bernardus that makes it so chocolatey.