The Register's page on deploying a Pi-Hole 6 to cut out advertising crap is interesting stuff given the vile behaviour of browser companies over recent months - https://www.theregister.com/2025/03/08/pi_hole_6_flyby/
The Pi-Hole website says you can buy a complete kit for this from The Pi Hut - https://thepihut.com/products/official-pi-hole-raspberry-pi-4-kit
I'm tempted.