My name is Luiz and I work for Embraer.
I only saw 2 photos of CoEx ERJ-135 posted on INternet. Please look at this two pages:
If you need to know which ERJ-135 EMbraer already delivered to CoEx... The aircrafts are:
N16501 (sn 145.145); N16502 (sn 145.166); N16503 (sn 145.176); N25504 (sn 145.186).
All the best