Back in April 2011, I was getting used to the ergonomics of my then-new Leica M9 and found that it needed an add-on in the form of the extremely well made Thumbs Up EP-1, produced by matchTechnical (see above photo). It has remained on my M9 since then, as I found it to be invaluable while shooting with it...adding stability and improved handling.
With the advent of the Fujifilm X Pro-1, I was expecting a similar add-on from matchTechnical, and true enough, it has recently produced the Thumbs Up EP-75 specifically made for it.
Without seeing it, I'm certain about the quality of the Thumb Up EP-75 ($118 inclusive of shipping), but hope it doesn't interfere with the X Pro-1's Command Dial.
Since well-thought and successful products are frequently imitated, I should also mention the Lensmate Fujifilm X-Pro1 Thumbrest is also available. It's described as being milled from a block of 6061 T6 alloy, and has the fit and finish equal to the camera itself. It sells for $75.
|The Lensmate Thumbrest|
I have no relationship with either matchTechnical Services or with Lensmate (and/or any of its retail outlets) other than having bought a Thumbs Up EP-1 from the former.