Ok finally brought the coach back home to take some pics.
I bought some 2x2x3/16" square pipe and some 1 1/4x1 1/4" square tubing thinking this would be a snap.
Unfortunately, unlike the Melbourne, my Grehawk has just under 2" clearance between the frame and the coach where I needed to mount the spare, so I was not able to put the 2" pipe on top of the frame.
I ended up cutting the 2x2 and welding some feet on it so it would sit inside the frame rails I then welded another chunk of 2x4 on top of the main cross piece to mount the winch to. This allowed me to get the tire up as high as possible, and to make sure I had clearance to run the actuator for the winch out the back so I can raise and lower the tire with a 3/4" socket just inside the bumper. I used 1/2" bolts to secure the mount to the chassis as my grey tank slides out toward the back where the spare is now mounted, so if I ever have a problem with the grey tank I can easily remove the spare tire carrier and drop the tank.
I mounted two pieces of square tubing in a similar manner about 11" in front and back of the center of the tire to draw the tire up against, but the bolts go from top to bottom rather than though the sides of the chassis rail due to the positioning of the BigFoot Levelers.