I guess it could be accomplished with lighter springs or a trigger/action job.
In the meantime, a good way to SMOOTH the DA trigger pull, try this:
http://www.gunblast.com/Poorboy.htm
This will not cost you one cent.
I've done this with all my revolvers and autos that have hammers. I just did the first step of the process, and noticed a marked improvement in smoothness. Try it five or six times, and don't overdo it with too much pressure.