Your employer has to apply (and get) the WP3 at the Labor Dept. Then he can send you a proper scan so that you can upload it. This WP3 is valid only 30 days from issuance.
Surprised when I read: "my company has no clue about it"
Every serious Thai Company should have a clue about WP3
According to their website:" The E-visa process can take up to approximately 3-4 WEEKS, depending on the type of your visa and the completeness of your documents."
The first thing she has to find out is whether the marriage is actually recognized by the State where the husband was living or if it had been properly registered (Most states recognize the validity of legal marriages registered in Thailand but not all of them. To register the marriage in the United States, he must have contacted the Attorney General in his state of residence)
If the answer is no, then no hope for her.
If yes, she definitely should contact an American lawyer to get accurate advices.