If you must use an eaton --
then no one will make you a bracket easily or cheaply
there was a swiss company that used these chargers for saxo,s --not very successful and the way they did it was a shaft right along the front of the engine and charger was mounted over g/box .
the reasom why you can find mini eaton chargers cheap is they are not big enough to give lots of power ,so people change them for larger units
mini made 160 using 14psi --to much heat + power consumption
rtorex on a saxo will give 220 using 14psi , you decide
but anyway your bracket i suggest you get a piece of MDF and make one up --when you have made it wrong ,which you will ,its easy to modify or screw another bit to it .
when the MDF template is perfect take it to a laser profiling company and get them to copy it .
It is the way I would make a new application ,as you /me /anyone will never get it right to start with and you can modify mdf in seconds with a jigsaw or add bits to it very simply.
you try modifying a 10mm steel plate takes along time and hard work