Really Right Stuff have a Fujifilm X-T 2 base plate available for preorder today, I've got my order in and will update this post with a review once it arrives in the UK from the USA.
NOTE: When ordering the plates for the X-T2 be careful about selecting the option 'I will be using the Battery Grip' as this option is for a specific bracket for the grip that will not fit on the camera body only!
“Really Right Stuff camera body plates are all custom designed for each camera body and precision machined from solid blocks of 6061-T6 aluminum. Fully compatible with any RRS style quick-release system, our plates feature precisely contoured anti-twist flanges for a perfect fit that prevents twisting between the camera and our plate. All of our quick-release plates utilize a custom machined ¼”-20 threaded, captive-style mounting screw that threads into the tripod mounting socket of your camera body.
Really Right Stuff camera L-plates feature two dovetail mounting surfaces in the shape of an “L”; one on the bottom of your camera, and one on the left-hand side. This additional mounting option allows you to quickly change between landscape and portrait orientations while minimizing the need to recompose your shot, saving you time and hassle. Also, an L-plate keeps your gear centered directly above the tripod’s apex which helps maintain the best stability possible.”