Looking for old version of Adobe Acrobat 11

Hi there!

I am a developer who needs to test my program against Adobe Acrobat 11, since it is still supported until next year.

The program I am testing checks for vulnerabilities of existing programs and then updates them automatically. This requires me to download an old version of Acrobat 11 for testing. I don't need a full version, just a trial version as I am not looking to purchase this product. My issue is that I cannot find an old trial version anywhere online.

I hope this is clear, where could I potentially get an install file for an old Adobe Acrobat 11?

Thank you!

Alex