Venue 11 Pro (7140) accessories questions?

I have picked up a used, but in excellent shape Venue 11 Pro model 7140. I'd been wanting something smaller, lighter, and newer than my aging Dell Studio 1737 Laptop. I have a newer gaming rig that I built myself that I use as my main computer, but I occasionally like having a mobile computer for light work. Something I can use to play with photos, do some light work, surf the Internet on lunch at work. Anyway, I got a decent deal on this six-year-old beauty and, while it comes with a lot of accessories, I'm looking to buy more and I don't have any of the old part numbers. Being six years old, you can imagine that there's not a lot of info on the Dell site any longer when it comes to accessories. I'm mainly looking into the slim folio cases, the hard case (shell), and the slim keyboard. I'm seeing quite a few that list they're for the Venue 11 Pro models 7130 or 7139, but not finding much of anything listed as for the 7140. I'm curious if the case accessories for the 7130/7139 will work with my 7140 or if I need 7140 specific case accessories.

Does anyone out there still have any information on  the old Venue 7140 that may be able to help me?

Thanks!