I suspect you’re mainly going to see different sights, maybe some grips, and trigger jobs...not much else out there, as there’s very little aftermarket for the EMP.
I installed Tru Glo Big Dot on my 3 inch and moved the sights from that one onto my Champion size-but nothing else.
They do not require much customization to begin with-and the trigger's on both of mine are already pretty good.
I think that Springfield has a little different set up on the trigger's to begin with.
Given the EMP is for the most part not a typical 1911 in size and specs-it makes it a little more difficult to modify.