You can find some on the Keychron website Example (as Christmas is already knocking on the door): https://www.keychron.com/collection...
You can of course have them made yourself or order them from other sites and customise them to your needs. The important thing is to make sure you buy the right size, see the chart here: https://www.keychron.com/pages...
hope this helps :)

This version already has the CH layout :)