Gday Kevin
Have you looked at the Classic Families website?
Go here www.peppertreefarm.org
Click on Breeders World up the top. Then click on Classic Families. Enter Presidential Ball in the box.
When the screen comes up click on the Classic Crosses tab. Gives you a list of all horses that have won classic races that are out of Presidential Ball mares. Shows sires, horse name, etc. Can sort the list by clicking on the column headings. Also can click on any of the underlined fields to 'dig deeper'. Its not a list of all winners just classic winners (if you click on Classic Races up the top it gives you a list of what they are).
Also if you go here http://www.harness.org.au/ausbreed/r...nline-rpts.htm there are all sorts of reports (including broodmare sires reports) that are now available for free. You need to register first (tells you how to do it on that page above) to get a username\password. But all free.
Cheers