The information you are looking for is most certainly not available - load data is highly guarded by airlines, and even by employees, likely only available to those in the organization who need it.

Want confirmation? Look back to Canada a few years ago where there was a big case with some pretty severe spy allegations/actions going on - believe a Westjet exec at the time (formally of AC, too, IIRC) was found to be stealing load (and other) data from both AC and the now defunct JetsGo, including somehow accessing the AC employee system they use to book flights, and going through trash at the home of an AC exec. It was not pretty.

UDU stats is really the only place to get data from, as far as I know, as imperfect as it is.