The Best Answer
I don't have a suggestion for that movement, but for the same muscles workout (hamstrings / glutes) you could try a 'Stiff Leg Deadlift' check out...
This shows it done with a barbell but you could use dumb bells, I'd imagine maybe even Kettlebells - though not tried it with them admittedly!
Hope that helps
If you are looking to shape your butt - kettle bell or Dumbbell swings will do it. If you want to develop the bicep femur you can try an iron boot found at this link iron boot .
I have seen irion boots, but have never used one.
A properly done bridge will activate every muscle in your posterior so you won't get the isolation of the reverse hyper, but you will work your entire backside. That being said, it takes a while (sometimes months) to build up the strength to do a proper bridge, which may or may not fit into your plan.
If that is a pain, go with the kettlebell swings.
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