Eddie,
I found the catch and shoot stats on NBA.COM. Unfortunately, they only started their advanced stats page last season, and, like you, I can't find those numbers going back beyond last season.
One thing that did jump out at me from perusing those stats, though, is that for top point guards, generally speaking, the catch and shoot is not a big part of their games.
The point guard who scored the most off catch and shot situations last season was the mediocre Jose Calderon. He scored 5.8 PPG off catch and shoot, good for 21st in the league in that category. That means that the top twenty players in that category all played a position other than point guard.
Damian Lillard was second among point guards at 4.5 points per game off catch and shoot. He ranked 62nd among all players in that category. He was followed by Lowry and Curry, who both scored 4.1 PPG off the catch and shot.
Chris Paul was at 1.7, Westbrook at 1.2, Wall at 2.3, Dragic at 2.7, Parker at 1.5, Kyrie Irving at 3.0, Ty Lawson at 2.0, Bledsoe at 1.6, Rondo at 1.0 per game.
So, while Rondo was bad, a player like John Wall, who actually had a fairly good number of catch and shoot points per game for a point guard, only scored 1.3 PPG more than Rondo in those situations.
I think it's fair to say that based on the numbers from last season, top point guards generally don't produce a large percentage of their points in catch and shoot situations relative to other positions.
This makes sense intuitively. The numbers back up what makes intuitive sense.