After more analysis, Google drive is the best solution even with the zipping issue. Even with the zipping issue (see below for workaround), it takes the same or less time to download the installers than DropBox (the only possible alternative so far).
DropBox: How to download isn't always obvious. DropBox needs an always visible download button/link. Customers will end up double clicking and not being happy with what happens. What to do after that mistake isn't that obvious. Also, always it takes >=2 minutes to download!
OneDrive doesn't seem to lock down folder sharing user names (not obvious) enough to be a viable solution. Also, it always takes >=2 minutes to download!
Google Drive Zip WORKAROUND:
If you don't want the installer zipped and you want a much faster download, use Chrome with syncing turned on.
If you don't like Google Chrome, I understand. Everyone has their reasons. I was using Firefox for years until Firefox decided to completely stop syncing my account.