This is a list of all the items you unlock during the smuggler's mission mode, and what mission you have to beat to unlock each item.

TRAINING 3 - Special Du Monde
MISSION 2 - Super Buggy Boost
MISSION 4 - Baja Truck
MISSION 5 - Du Monde Oil Slick
MISSION 7 - Baja Truck Bombs
MISSION 9 - Vietnam
MISSION 10 - ATV Monster
MISSION 11 - D-5 Hondo
MISSION 14 - ATV Boost
MISSION 15 - Hondo Oil Slick
MISSION 18 - Sahara Special
MISSION 20 - Sahara Smoke Screen
MISSION 22 - Russian Winter
MISSION 24 - Grenadier
MISSION 25 - Grenadier Bombs
MISSION 27 - Kavostov Halftrack
MISSION 29 - Kavostov Smoke Screen
MISSION 36 - Dual Career CM's (second countermeasure can be used in smuggler's missions)