Cheapest and lightest method is just some oil based paint with sand (or proper anti-slip additive) mixed in. Depending on how hard you are on it, it...
Previous owner of my trailer put this type of carpet down. After 20 years, a few oil leaks, it's time for new. Some places sell in 8' or 12' widths....
I bolted my toolbox to the floor just in front of the race car's RF tire. It served as a chock and I could easily reach all the tools from the door....