Bangkok Bank you can ask via their application a 12 months statement for a saving account and send via email within minutes.
Unfortunately you can not do it for a fixed account. Therfore you need to ask it at your branch and it will be send by email the next 3 days (cost 100 bahts).
But since July 15th there existe no more restrictions about the quantities of entries; but the immigration officer can ask you why you enter and refuse if he is thinking that your purpose is not tourist but living in Thailand.