Other than having a friend gift it to you, the only other way is to complete the "Break Into the Armory" job which is a job in the Underboss Tier because it's available as a loot drop item via that job only.
Underboss job "Break into an armory".
do the underboss job: break in to the armory, it will be given to you randomly
A person can get a multi-purpose truck on Mafia Wars by completing the Break Into the Armory job. The truck was only available in August of 2009.
The firebomb in Mafia Wars by Zynga is obtained through the job STEAL A TANKER TRUCK at the soldier stage.
BJ
Go back to NY and buy them
the delivery truck is available at the item store in New York. this item is not looted.
The Delivery Truck could be bought in New York for $20,000
Go back to NY and from the inventory screen you can buy them
Tiger Sculpture Steal a Tanker Truck
You can get the armored TRUCK on the .......Enforcer - Smuggle Thai Gems
You can either do the job "Smuggle Across the Border" under the enforcer level on Mafia Wars jobs or you can win it as loot in fights against other mafias.