You cannot become a certified drysuit specialty instructor with OWSI. As an MSDT, she could have become a drysuit specialty instructor legitimately during moths of diving in Montana, when she would have had ample opportunity to become a drysuit whiz. However, a drysuit whiz would have absolutely known that the planned dive could not be done without the ability inflate the suit.
If she were not a legitimate PADI instructor, she could not issue PADI certifications at all. In one case I know, a shop (in Florida, IIRC) was issuing fake PADI cards after the classes.
If you look up
Aquastrophics, you will find a dive operator who will give you a certification card for any agency you like--just tell him it is a replacement card and identify the agency you want. You will also find all sorts of information about what they offer, including online nitrox courses. They will also tell you they will offer cheap online classes that can be used in lieu of the academic portion of the OW classes for other agencies, which is not true. they have been doing this for at least 15 years, and they are apparently still doing it. What happened is that the owner was a NAUI instructor who got expelled by NAUI, so he just created his own agency, which is not considered legitimate by anyone except his students. I have not checked in years, but the last time I did, the listed company headquarters appeared to be a vacant lot. I contacted the Attorney General for Arizona years ago, and apparently it is all legal--or at least the AG was not interested in pursuing it.