I would start hunting for a parted out vehicle and get the tranny. I'm not sure how far your wife drove it dry, but I'd say it's probably beyond a "soft rebuild". Pull the tranny pan off and inspect for metal shavings...that might give you a better indication.

I guess the real question is, how did the tranny run itself dry?! Hose? Gasket?

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2009 ML350 (106K) - Family vehicle
2001 CLK430 Cabriolet (80K) - Wife's car
2005 BMW 645CI (138K) - My daily driver
2016 Mustang (32K) - Daughter's car