With a name like Sergio and not sure what country you are from, it's hard to tell you where to go to purchase your enema bag. In the US, we would go to Walmart or any local drug store. The enema bags are usually located in a place you don't expect them to be and a lot of us (especially me) have funny, but embarrasing, stories that happened when we purchased our first enema bag! Ha
I am so happy you are on the road to good health!!