Option 3. This works for all users even if they don't have an avatar.
Apr 12, 2022: The link for the avatar folder for each user can now be accessed on the SA site, thanks to Jeffrey. So now any user can be searched on here with the new Option 3. You will have to do a little copy and pasting though. I can't automate it completely with this site due to SA's security settings. BUT it will eventually be automated with the userscript below since that effectively runs on SA. That will be updated soon, still testing. FYI, you can enter the avpath with or without quotes and/or the slash.