You can try searching files ending with: (1)
Nah bro they have the crazy letters and numbers with _source but they'll be the same but lettered diff or have a slight difference in length
I use one for Windows called "Similar Images"
It doesn't just find exact duplicates, but also images that are similar enough based on a threshold that you can modify. This means that it can also find images that are technically duplicates, even if they're not exactly the same. There can be false positives, but the program does ask you what you would like to do with each set of similar images that it finds. There are also several different search options as well, as far as which directories you'd like for it to search through.
I need something bc I downloaded a bunch of onlyf@ns and I swear I have doubles but they are slightly different and it doesn't detect them.