From the home page of any of these superintendents' websites, you'll be able to get to the Judging Program.
On Onofrio's site, select the "Show Information" tab then "Upcoming Shows," then scroll down to find the show you plan to attend. Click on the highlighted name of the kennel club sponsoring the show, then scroll down a bit to see if the judging program is available.
On Roy Jones' site, scroll down to "Judging Programs/Breakdowns" and you'll find out if the judging program for your show is available yet. (If not, you can check "Breakdowns" to see how many Newfs are entered, but it won't provide ring times.)
On Foy Trent's site, just scroll down to the show you're interested in, and if the judging program is available, there will be a link to it.