Just go to google play and contact a developer that has an app closest to what you need. The SlideMe app Store takes this 1 step further and devs can select if they are ok to be contacted for projects.
Also no one will take you seriously if you don't have a document describing what kind of app you want. The first line/paragraph should be goal and purpose of the app. The list of features, target audience (internal use, external use, age range, etc..). Example layouts is a big plus. I would suggest to present this document in the first contact email.