Write to Trader Joe's and tell them we would love for them to open a store in the Metro North Mall in Kansas City's Northland (Barry and 169 Highway).
A store employee told me the company is very receptive to these requests and determine locations by the number of these requests.
Trader Joe's Company
800 South Shamrock Ave.
Monrovia, CA 91016
You can also send them an email from their website!