Are you looking for something specific? Taco trucks here serve mostly tacos and burritos. Do you know what fillings he liked? You could serve soft tacos filled with carnitas and carne asada. You can search both recipes at: www.epicurious.com
For one taco, you use 2 small warmed corn tortillas (one on top the other), add some carne asada or carnitas, a little chopped onion and chopped cilantro, and green hot sauce. You can find the "salsa verde" in cans near the enchilada sauce. If you can't find it, email me...I'll send you some.
You can serve it with "horchata", a taco truck staple. It's a rice drink that helps with the afterburn.
1 cup white (long grain) rice
4 cups milk
1/2 cup sugar
1 tsp. vanilla
1/2 tsp. cinnamon
Place the rice in a bowl with enough hot water to cover. Let the rice sit in the water overnight. The next day, drain off the water. (You may have to do the rest of the recipe in batches unless you have a big blender)Place 1 cup water, rice and milk in blender. Blend until the rice is totally liquified. Mix in sugar, vanilla and cinnamon. Strain through cheesecloth or coffee filter. Serve with ice.
I know at a time like this, there is nothing anyone can say, but I hope we can help you out a little. If you need any hard-to-find ingredients sent to you, or suggestions for substitutions, let me know.