People have used NOA 1 or 2 or almost anything indicating the need.
Myself and at least one other member found a way around the BKK method even though there are those that say it cant be done. I went to the police station in my town where I paid about 3K baht in what farangs call tea money. I had the cert in a week. She is Thai and would know how to approach this.
The other member may advise as well but if I remember right they paid a little more but also succeeded in a different town.