You can get any milk fat percentage you like if you stock nonfat milk and heavy whipping cream in your refrigerator.

For each 1% of milkfat, add either 1 tsp of heavy whipping cream or 6g to each cup of nonfat milk.

1% milk = 1 cup nonfat (245g) + 1 tsp heavy whipping cream (6g)
2% milk = 1 cup nonfat + 2 tsp heavy whipping cream (12g)
Whole milk = 1 cup nonfat + {1 tbs + 1/4 tsp} heavy whipping cream (20g)