Sorry, no, but that's a great idea. I've added this to the wish list.
It's not as easy as it may seem, from a memory-management standpoint. Roastmaster lets you blends roasts of beans or blends, which could conceivably recurse a few levels deep, so it's not as straightforward as determining the inventory of a single bean. But, I really like the idea. I'm interested to see if there's a way to implement something like that in a memory-friendly way.