Many times these types of forms are drawn up by lawyers. These forms can be very expensive and are not essential. It is only advisable for those who do not have time or resources to create this document on their own. A commercial lease agreement is different from a residential one. That is, renters have far more latitude such as constructing a building that suits their business but they have far less freedom in terms of what they can do with the property they are renting.
When you need a confidentiality agreement template, you can find many different samples online to choose from or you can buy them in many office supply stores. Those that you download will often include instructions for completing them so that they meet all the legal requirements for your particular state.