Season pork with salt and pepper; rub with 1/2 cup curry sauce. Wrap in foil; bake in 350°F oven for 2 hours. Cool to room temperature; shred. In large sauté pan, heat oil; add onions and peppers and sauté until soft. Add pork, tomatoes and 3 cups curry sauce; bring to a simmer. Heat tortillas in microwave or dip into hot oil for a few seconds on each side to soften. Spoon 1/3 cup pork mixture in the middle of each tortilla. Top with 1 slice avocado; roll up. Spread 1 cup curry sauce in the bottom of a shallow hotel pan; place rolled tortillas in pan. Brush tortillas with 1/2 cup curry sauce; sprinkle with cheese. Cover with foil; bake in 350°F oven for 20-25 minutes. To serve, drizzle with 1 cup curry sauce; sprinkle with cilantro.