Just picked up a set of Techwell Positech Ergonomic grips. They aren’t the same as a 2011 but are much better than any other 1911 grips that I have tried.
One of the X-line triggers was an older one that was previously fit to a Cheely grip, was nearly a drop-in with the MPA. The newer triggers seem to have a little thicker material for the bow, but that wasn’t much of an issue.
I have installed X-Line triggers in 3 different MPA pistols.
It shouldn’t be difficult to do so with most “2011” triggers.
Grip safeties may need some fitting. The MPA grip is cut pretty high.