Included is an autocad drawing of the part you described above. Other than I didn't know what size bolt holes you wanted so I assumed 1/2" If you open it you will notice:
1) using a 6" outer diameter the bolt holes on the 5.5" pattern(s) will cut through the outer edge of the plate. Also one of the 4.5" 5 bolt holes & one of the 5.5" 6 bolt pattern holes also intersect. That can be fixed by rotating the 4.5" circle a bit.
Hope this helps.