How can I get an obsolete iPad app to someone who needs it?

Ten years or so ago I had an iPad app called ***** Scheme III on the app store. I stopped upgrading it, and it is no longer there, and indeed, it does not run on current devices. I recently received email from someone who has an original iPad, which would run the app, and who wants it. Is there any way I can get a copy to that person?
How can I get an obsolete iPad app to someone who needs it?
 
 
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