There is a detailed/dimensioned screen shot of a CAD model in this thread.
Are you thinking of just having it laser cut out of S.S.? If so, please find out how much they will charge you for a second one as I might be interested based on cost.
Note: The rear cylinder sits further to port/front is more starboard. I had to use a 1/2" (or maybe it was 3/4"?) spacer on the rear screw to make it 'sit' correctly.