Am I seen that correctly that one can't upload images in PMs, only in the forum?
This one isn't exactly new, I'm afraid. But it has that MHz Display.
But these are rather common, if you find one online, ask if there's a display built in, sometimes it's missing.
Some more cases as an inspiration:
This is 1997 vintage, NOS, but rather boring, Turbo key, but more like "Pentium 1 p54c-166"
Desktops with 2.5 digit display, they do exist. Apart from that, this is pretty much the archetype of standard Desktop cases - somewhere towards 1990 they settled on "three 5.25, one 3.5, that's enough for anyone":
For me, the best case ever, and also the first. Rather clean design for late 80s, sturdy build, tinker-friendly. Mine used to house a 386-40, what else? It's pretty common, actually, saw at least one per year leave that other bay:
This was actually and officially called the "08/15" series by German OEM Vobis. (slang for "nothing fancy, totally boring standard run of the mill garden variety crap"). It does have a display behind the shade on the left, if Vobis bothered to install one. Mine is in better shape, hardly any yellowing, housing the original am486-40 ISA system with 4 MB, no cache and 170 MB HDD. Yes, Vobis were a bunch of cheap shits. Their machines are not, nowadays.
A truly weird fella: AST Research Bravo MT 4/66d, a 486 from 1993. Good luck finding another one in Europe.
Yes, it's upside-down, except, it isn't. Drive bays are at the bottom. Also, the Mobo is "quasi-ATX" meaning the proprietary connectors at the back very closely resemble the form factor not introduced until three years later, down to the 7 slot count. Neat system with VLSI chipset, homebrew BIOS, onboard ATI graphics and PS2 RAM. Well, AST happened to be the 9th in the gang, who did not make it:
And obviously, the less said about this one, the better:
Technically, all of there are for sale, for the mere reason that my hobby space suffers from limited threedimensional resources, eventually. Just don't expect me to part easily
To find them offered for sale elsewhere, well, very few people seem to understand that "AT case" does not mean "less specific ATX case" - so basically, all you can do is browse the miscellaneous for anything beige

Another approach to a 486-era case would be to look for Pentium 1 machines, as they were a common upgrade. Those are cheap and easily evicted.