Quick one for you:
The SmallRig DSLR Cage with baseplate, suitable for most DSLR cameras.
SmallRig DSLR Cage (with baseplate) for DSLRs less than 130mm high, includes Both medium size DSLR cameras like Canon 5Dmk3, 5Dmk2, 7D, 6D, and Nikon D300, D600, D800, D7000 and smaller DSLR cameras like Canon t2i, t3i, t4i, t5i, 60D, and 550d, Nikon D7100, D7000, D5200, D90, D5100, D3200, D3100, Panasonic Gh2 and Gh3.
The top safety rail is compatible with standard QR handles.
Please see SmallRig and COOLLCD for about the SmallRig DSLR Cage.