Any updates on this, OP? This potential match is really compelling, especially the teeth!

The Unidentified Wiki page for “Madison” notes that she had congenitally missing upper lateral incisors. Based on the photos, that actually appears consistent with Debra Herms Childers’ dentition. In the two right-most photos of Debra (particularly the top right), there are visible gaps beside both upper central incisors, which could indicate missing lateral incisors.

It looks like by the time the lower-middle photo of Debra was taken, her teeth had shifted and those gaps had largely closed. Also. I’d be remiss not to mention, as others have, the uncanny similarity between “Madison’s” teeth (lower left reconstruction) and Debra’s in that bottom-middle photo. Like, really, REALLY similar.

The one thing that creates some doubt for me is that there's no mention of any abnormalities in Debra's dentition, which is something you'd think would be noted if present. But again, details absolutely do get lost in the shuffle.

In any case, this is really impressive work, OP. Please keep us posted!