To the extent that funds are available to pay holders of allowed unsecured claims in full or the amounts due as of the time of appointment, each holder shall also be entitled to receive interest, calculated from the time of appointment, at the rate set forth in the agreement evidencing the claim, or if no rate is provided, at the judgment rate that would be payable as of the time of appointment; provided however, that no holder shall be entitled to interest on that portion, if any, of its unsecured claim that is itself interest calculated from the time of appointment. If there are not sufficient funds in the receivership to pay in full the interest owed to all the holders, then the interest shall be paid pro rata.