Everyones talked it over, and here's the logic as well as the the answer. There's several problems that even trying to do this would result in, first of which is: we would be robbing Peter to pay Paul, as it were, since the essences and such in the cabal bank currently are not the same ones that were donated by you. Three months have passed and those essences are the fruit of the work of current members who donated them to use with the cabal.
Secondarily, donations are not mandatory - if you didn't want to give those items up to be used by other people, you were not obligated to donate.
Third: you equally benefited from lair summons that others donated at the time as much as they benefited from yours, so even if the whole thing was strictly transactional in nature, the ledger seems balanced in that regard.
So, the answer is kind of obviously no, but that's the logic and reasoning behind it. There is simply no way to do such a thing in a way that is fair to all involved.