How can a British citizen marry a Dutch citizen in Thailand to obtain a Non-O visa?

Hello everybody. I have a Non-B teaching visa and work permit and got a 1-year stamp. I am Dutch and my British partner will come here in a week on his third tourist Visa. We are not married and we want to get married in BKK in order for him to get the Non-O visa because proof of a long-term relationship is not enough, you actually have to sign wedding papers. He does not work and is not planning to work, he would be depending on me. Is this possible and if so, does anyone have information about this process? It would be a marriage between 2 foreigners within Thailand and a Non-O after that. Thanks!