Looking for recommended fuse panel/block

I've got everything for my under seat (passenger) ViAir compressor install, and now thinking about how to power it. Will most likely run the wiring through a floor grommet along the frame into the engine bay along the firewall to the battery...but there is no more room on that positive terminal for more stuff!

I've seen a couple of things like a giant insulated metal bar that gets bolted to the firewall with a cover, and you can screw in wires to it, or something like a giant bolt that hangs off the positive battery terminal that allows for more screw-type terminals to be attached.

Wondering what people have done to solve this power problem, looking for any ideas. I have a Redarc 1225 but not decided on where to mount the 2nd battery yet (stupid Sport model has brake coil thingy on passenger side where it would normally go) so need something that can be switched over to 2nd battery at some point later.

 

https://tacomapros.com/bussmann-rtmr-fuse-relay-box-prewired-4-ft-lead/

I found the above googling, has anyone used it? I believe it was a group buy on TW back in 2015...wondering if it is worth it to build my own from components?

 

$22 True Mods 12V DC Auto Waterproof Fuse 5-Pin Relay Box Block [6 Bosch Style Relay Holder] [6 ATC/ATO Fusible Holder] Universal Relay Block Box for Automotive Vehicles Cars Marine Boat Light Equipment

https://www.amazon.com/dp/B07MR64XK1/?coliid=IIOXWG2AF1Y1B&colid=12A20CTJF8F10&ref_=lv_ov_lig_dp_it

$19 Mofeez Bus Bar 3 x 1/4” Post 10 x #8 Screw Terminal Power Distribution Block for Car Boat Marine (Red & Black)

https://www.amazon.com/dp/B07KVW7F5X/?coliid=I3HH5RFA5ECYBB&colid=12A20CTJF8F10&ref_=lv_ov_lig_dp_it

https://www.amazon.com/dp/B07MR64XK1/?coliid=IIOXWG2AF1Y1B&colid=12A20CTJF8F10&ref_=lv_ov_lig_dp_it

just look around Amazon. Decide how you want to power/switch