T&M Abroad: Otzar ha'aretz and pidyon on Israeli currency for members abroad

Question

Shalom Aleichem! I am the rabbi of a retirement community in Monsey, New York. We often receive Israeli produce, particularly tangerines and carrots. Since the carrots come in fifty pound bags, and the tangerines are in cases of fifty or a hundred, I am not really concerned for the need of a Perutah Chamurah. Still, it would be convenient for me to avoid the need to keep track of how many times a coin is used. Is there a way that I can make use of your Perutah Chamurah? Does it matter that I am in the U.S. and making the pidyon onto Israeli currency? Thank you.