Old? It was only a month ago. And, as it turns out, it’s been a productive month!
No one on this sub mentioned it, but I kept digging and found an L-shaped adapter for half-size PCIe to M.2 form factor.
That allowed me to order the most compatible card I felt would safely fit/work. Also had to order converter antennae. (I suggest buying a second pair of those, as they’re incredibly delicate but also inexpensive.)
Here are the Amazon links and a photo of the Frankenstein WiP. It all fits with no visible bulge, though you can almost feel something if you’re trying hard. It’s currently running Win 11 Pro Lite (for testing and prep). Oh, and I wrapped the antennae connections with electrical tape, which was after I took the photo.
Hope this helps. Keep me posted if you try this out yourself.
Sintech NGFF M.2 (Key-A+E/Key-E)... https://www.amazon.com/dp/B00KZHDK28
BCM94360NG NGFF M.2 2230 WiFi... https://www.amazon.com/dp/B0861T79QY
Superbat MHF4/IPEX4/IPX4 to U.FL... https://www.amazon.com/dp/B07SZBKYHP
FrankenHac: https://i.imgur.com/u7KiTs1.jpg