Lokar Hand Parking Brake
I almost didn't want to say anything but out of the 3 that we installed in cars they all broke within the first year. Several problems,button hangs up, ratchet broke, and they all seemed to over center if pulled too hard. This was a few years ago when I was working for a hot rod shop. They may be better now. I do like your box set up. Much better as mounting on the tunnel it will be too low and really doesn't fit the hump without shiming anyway.