@Dan ********
you are confusing the requirements of getting a Non-O inside the country and getting a 90 day single entry Non-O at a thai consulate outside the country :/
All you need in Vientiane or Savannakhet are copies of
the data page of your passport
the two marriage certificates (Kor Ror 2 & 3)
your thai wife's i/d
your thai wife's house book listing
you also need the original Kor Ror 3 (the one with the rose border around it), they wanna see it because it has an embossed seal
Your wife signs everything with her name on it and you sign everything with your name on it.
Those things and 2000baht are all you need to pull a 90 day single entry Non-O in Vientiane.