Rear bagged suspension built ?

[Spaz]

I was wondering if anyone can guide me alon on this. I want to do a simple bag set up on the rear. What i was wondering is there anyway i can leave my trailing arms and just add a longer external bar and mount my bag on it outside the frame as kinda like a 4 link? I am thinking of getting some hangers and mount them to the frame. Then get a bolt on lower bar from a company i found. Just wondering if this would work? Looking for something easy and quick to do.
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