Hori FS EX2 bottom plate measurements (or replacements)

Back in 09', I was doing a modding project for the FS ex2. In the process, I lost the bottom plate. For quite sometime, it's been bottomless

I am trying to see what the measurements were for the bottom plate. I want to cut out a piece of sheet metal to get it in there.

If that doesn't work, the. I guess the next best course is finding replacements from hori

And if that doesn't work, then I will have to produce a makeshift bottom piece

Can TT help me out with this?