Good question Ben
I'm gonna assume he just wants the tool size, considering the alternative. The size tap required to tap the drain is rather large and would probably cost as much as a used transmission! Although he could be looking to find replacements...in either case, I don't know :???:
Both plugs use a square drive. For the RS5F32V trans, I usually use a 1/2" drive breaker bar w/a 4" extension and for the fill plug, a 3/8" drive. It may not be a perfect fit...especially if someone else already boogered it up. I've seen attachments made specifically for these type plugs but never needed a set.