Generate data by only certain US zip codes

I need to generate contact lists but only certain zip codes in a state would appear.
Ex: State GA
Zip codes: 30222, 30338, 30047 etc.
This data would be used to build a demo zip code over lapping map for client areas for store locations.
We are trying to sell management on the use of Data Analytics but they are not getting the concept. We have concerns about cannibalization.

What is the best way to approach this problem?