[ceravis]

Custom OEM size/fit has been addressed to some degree for a quite a while now by both the "mainstream" car audio manufacturers [1] and, more extensively, by some lesser-known aftermarket brands [2].

YMMV based on just how old your car is and the type of OEM head unit, but there are kits (e.g. this one for a 2016+ Honda Civic [3]) that allow you to install "standard" head units with a fit/style similar to OEM.

[1]: https://www.crutchfield.com/g_462350/Apple-CarPlay-Compatibl...

[2]: https://www.joyingauto.com/head-unit.html

[3]: https://www.crutchfield.com/p_120957812B/Metra-95-7812B-Dash...