I've been skirting this rabbit hole for a good while now, since even though I do electronics building my own keyboard seems excessive and I do like (and prefer) laptop keyboards.
I am, however, quite interested in low-profile, split Bluetooth keyboards with minimal layouts (like the Ferris - https://github.com/pierrechevalier83/ferris and the Sweep - https://github.com/davidphilipbarr/Sweep), and keep hoping someone manufactures one and slims it down to Apple specs...