FYI, I thought this was not possible either but if you bought it from Adobe you can log into your account, see your past purchases, and download the v6 installe

FYI, I thought this was not possible either but if you bought it from Adobe you can log into your account, see your past purchases, and download the v6 installer. I just did this like a week ago when I realized I lost my v6 installer. But you're right in a sense in that unless you have it on your Adobe account history, the installer is no where to be found anywhere else like it used to be.