Numb3rs Fanfic Finders

I know I've never seen anything like this and I can't find anything on this site (though I tend to miss tags easily, it seems.)

Are there any fics that center around Alan and Margaret dying while Charlie and Don are at uni but Charlie is still very much a minor so Don has to take custody of him? I would love to see lots of the brothers being forced together in that kind of relationship during the worst part of their history.

Thanks a bunch!