PokerTracker

I'd like to build some positional stats reporting that specify times/opportunities in the report for;

Att to Steal;SB
Att to Steal;BTN
Att to Steal;CO

Is there an easier way to do this in the report like in the HUD? or do I have to build some custom stats with the appropriate formating?

You will have to add the formatting (or mouse-over for the tooltip), but you can view the stats in the Positions tab for each position so you don't need to build positional versions.
Have a look at this post which explains how to add times/opportunities formatting.