why not go into your local government registry office, the same office you go to for birth certificates, and ask them for advice, could point you in the right direction, never know unless you try.
you jumped in with both feet saying that they would sure be orphans in your country, you didn't even ask the question, before you assumed, I have a lot of respect for people that are trying to give kids a chance in life, And yes simpleton comes to mind.
If it's the same as UK you have 3 months to enter Thailand to activate your visa,don't think it should make any difference what country you fly in from,