Based on the excellent key cap models from ‘dankwookiee’ on GitHub

https://github.com/dankwookiee/Kieeboard

I took the right size key and used FreeCAD to add a Fedora logo, with help from mang0jelly's great tutorial here: 

I've also created a version with a stem height 1mm shorter, as it appeared that the Razer keys use a slighter shorter stem.

To fit my keyboard I've used the R1 1.25U key from the OEM profile set, I've also included my FreeCAD model (a bit rough and ready) in case others want to tweak it further (i.e. adjust the stem size to suit their needs)