In a large skillet, cook and crumble the ground meat over medium-high heat until no longer pink. Drain grease.
Return meat to the skillet and stir in taco seasoning and required water according to package instructions. Cook as directed.
Warm nacho cheese sauce in the microwave and set aside.
Warm flour tortillas in the microwave for about 20 seconds to make them pliable.
Lay one tortilla flat. Spread a couple tablespoons of nacho cheese in the center.
Add about 1/2 cup taco meat on top of the cheese.
Place a tostada shell on top, then add a thin layer of sour cream, shredded lettuce, diced tomato, and shredded cheese.
Fold the tortilla edges up toward the center, working around in sections to create a sealed wrap.
Heat a skillet over medium heat and lightly spray with cooking spray.
Place the crunchwrap seam-side down in the skillet. Cook for 2–3 minutes until golden brown.
Flip and cook the other side for another 2–3 minutes until golden and crispy.
Repeat with remaining crunchwraps and serve immediately.