Buy some panceta ahumada and ask them to slice it thick. Soak the slices in a solution of water, liquid smoke (available in Chinatown in quantity and relatively cheap - recently bought a 1 liter bottle for $150 pesos) and salt. Proportions to your liking, may take a few batches to get right. Soak for about 8-12 hours in the fridge. Remove and dry, then store in fridge. When you cook them, don't cook them too hard too fast. Won't be quite as crispy (unless you burn them) but it will have a good flavor. Put some crushed black pepper on it when you dry for some pepper bacon.