This livery represents French Customs for the default King Air 350i designed for Analog King Air Black Square's Steam Gauge overhaul version.
The real plane has additional tanks on the engines and a pod under the fuselage for electronic equipment which is not modeled in this version. The livery on the engines without additional tanks had to be adapted but is consistent with the original design.
Thanks to my friend Thierry, pilot of the aircraft, for his photos.
Simply unzip Neuroflight-BKSQ-KingAir350-FC.zip file and drop BKSQ_KingAir350_French_Customs folder into your Community folder.
This livery is also available for standard King Air 350i at : https://flightsim.to/file/32637/asobo-kingair-350-french-customs-livery-4k