Anyone have any experience/thoughts about drilling out a small hole hammer, trigger and disconnector to the large pin size. I think there is only about .015 difference. I was going to pull the retaining springs back on the hammer and trigger, then drill in a press. The reason for this is I already have a 9mm Colt lower kit, but it is the earlier ones with the small holes, and dont want to spend 80 bucks to replace it if I don't have to.
Also, who has the large hole trigger and hammer pins?

Brownells, just don't drill it...

If I am not mistaken, all you have to get is a large pin hammer.  With the spring it is around $30.  The trigger and disconnector are the same in both calibers.  You should have no problem selling the small pin set.