I use a Bussmann for all of my 30 amp or less circuits with fuses or relays. It vastly simplifies wiring and makes troubleshooting and adding new circuits a breeze.
https://wranglertjforum.com/threads/bussmann-auxiliary-fuse-and-relay-module-installation.19796/
There are other fuse blocks available, though they often don't have relay slots. The exception is the SPOD, but that is very expensive and has a limited number of circuits.
The same terminals you would use for the Bussmann can also be used to create OEM style electrical connectors, anywhere from 1 to 60 pins.