Pendaflex PN1025 A-Z Top Tab Recycled File Guides, 25 pt. Gray pressbd., 1/5 Tab, Legal, 25/set

They weren’t exactly what I was looking for, but they’ve worked out quite well. I wanted heavy duty rectangular file dividers like these, but with the tabs on the sides. I don’t think anything like that is available, though, in checking Google, etc. I made these work by cutting off the tabs on top and taping them on the sides with heavy duty shipping tape. Suits my needs, and I made them work, so you can’t ask for much more!