MY TOOLBOX

Cutting a plate isn't difficult. . .

you just need a little muscle and perserverance. Of course you can buy plates that are ready for use but then you have to adapt yourself to them. I prefer making my own because I like the satisfaction of starting from scratch and making my own dimensions.

You need tools of course.  To cut, there is a particular tool (bottom of the photo) that resembles a hook. This has a flat cutting edge that is drawn across the metal plate over and over again until the cut is made. Otherwise. . .you can use a saw for metal or find a friendly blacksmith.