I came to know more about Ajahn Siripanno during my stay in WPN last year November. Totally didn't expect him to be there.
A laywoman asked if there is a way to catch Ajahn, or to know his whereabout. The replied given was that there is no way to know where he will be.
As far as I know, Ajahn told me that he is likely to be in WPN till February this year, and occasional trip back and forth Kanchanaburi. He didn't give a definite answer, that I must remind you.
I understand your difficulty, Siddhi. One option I can think for you is to go to WPN, talk to the monks there about the matter, and hopefully the monks there will be able to help you. Though I must say that, it is not guaranteed that they will do something for you. And if WPN is too far from where you are living now, I suggest to just go to WPN and show your sincerity in delivery the matter.