So I use the BCSO 2011 CVPI -> cvpi_sign_1 4k.dds texture. And I actually put the skin on this model, right here:
I only use Non-ELS vehicles by the way.
This looks awesome! I actually converted the original files to PNG to make sure, and it is pretty cool! I use only the Crown Vic texture. The plate is a bit off-center, but it does not matter. Nice job!