Combine two applications in to the new one

My company has customers in different cities. The company has developed two the same B2B applications (one application per city).

There was some reason to do that, but now we need to combine them in to the new application and after that we will remove old applications. The applications too old and source code was lost. Is it possible to upload two empty applications that contains only link to download new application and some text that we have developed new app? Any other ideas to achieve that?

Combine two applications in to the new one
 
 
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