Tried a dozen branches now (in expat areas), they all say no and try each other.
Spoke to an agent a few weeks ago and they said it was possible but would have to travel to Pattaya. Then the next day said their bank (Bangkok bank) in Pattaya was no longer accepting foreigners and they would be back in contact when they were. Heard nothing since. So think even agents can't help at the moment. It used to be possible if you bought an expensive product from the bank, but apparently not anymore.