Thank you for the link. Yes, I wish we could import good toilets. My low water toilet is the bane of my existence.
Go to home depot, buy a larger multi gallon tank, and a rubber washer to seal to the toilet, and a new float valve mechanism. set the foloat valve to the highest level prior to spill over, and vioa, you once again have a multi gallon flusher!
Best get a new wall valve as well, they go bad and leak when messed with.