Re: Triple? Why not likely.
No. I've seen 7T for humans and know people who worked with it regularly in Western Ontario (it is now being replaced). There are 9.4T systems scanning humans (their brains, not just their fingers) in Chicago, Minnesota, Julich, and Tubingen. If you want a reference read Duyn, J.H., The future of ultra-high field MRI and fMRI for study of the human brain, NeuroImage (2011), doi:10.1016/j.neuroimage.2011.10.065. You can, of course also get small-bore systems for imaging hands and hand-sized things at 7T and 9T - maybe these are what you are familiar with?
I agree entirely that the ratio between the fields in the interesting thing and human imaging systems is well out - I was just pointing out that there are plenty of 3T run of the mill turnkey systems from Siemens and the like out there.