A couple of options come to mind: You can buy a matched Hammer/Sear/Disconnector, and a trigger with an overtravel adjustment and install it yourself. Or have a 1911 smith work the trigger for you. Both options will end up costing about the same. I reccomend the second option!
Savage
I agree with what Savage said...........Have a competent 'smith that knows 1911's rework your present fire control system.
If your present trigger does not have an over travel adjustment, adding a new trigger that does have one will help to provide better trigger control, but your present hammer, sear and disconnector, if in stock condition, can be easily tuned to provide what your looking for.
For a carry/defense/target gun, I'd ask for a 3.5-4.0 lb trigger with no creep or over travel.
Tom
NRA LIFE