[Darren69]

The ones I was thinking of must have used the main rear set mounting and must have been fitted between the rearset and frame, and maybe dog legged somehow to line up.

You should be be able space out the rearsets from the frame quite a bit if necessary and should not have any issues in doing so. The original monster hangers were angled down and away about an inch or maybe more so hoses, wiring and stuff should still be long enough.