@Jesper ******
you need to use the immigration office, which serves where you are permanently living, if you want to use another immigration office, you need to change address/residency, so would probably be too difficult, or not possible, the preferred way seems to be, to just visit a neighbouring country for a few days, and get the initial 90 day Non O, from a Thai consulate/embassy, and return to Thailand, and later do the 12 month extension, at your local immigration office.