From what I have read, the AOD can be rebuilt to be even stronger than any T-5 you may find. The insides of Auto's is all voodo to me anyways so that is one of the very few things I would not try.
Considering the cost of finding a good T-5 and all the other parts, you could get a Lentec or etc AOD already built up, though those torque converters are pretty expensive If you use a cheapo used T-5 that could bust apart in a few weeks as well
Check with some of the AOD guys for advice before tearing it apart.