I think it is tm7 you needing that application. You can find it on line in pdf or word format so if you have a laptop you could complete it and print it out. It clearly states what the form is for. Make sure you have other docs up to date tm47 and tm30. You will also need bank statements and copies of passbook, passport and a photograph. Anything in addition like a map to your residence its best to ask at your local IO. Get them to write down in thai what you need from the bank as it will make certain you get the right things.
I have done 90 day report without my passport. Explain why you do not have it. Possibly you have a copy that will be just as good. If done online no passport needed either.
Keep going back to the same branch as it depends who you see on the day and what rank they hold. Go to main branches not the malls as the staff at those branches rarely deal with foreigners. I went to same branch of Bangkok bank 4 times before getting an account though I did hold a long term Visa extension. Keep trying or use an agent about 4000 baht.