Unfortunately, my CPU inventory is almost completely depleted. Perhaps I might be able to rustle up a spare somewhere, but don't hold your breath. Also run out of sundry items such as the special screws, and parts for contact blocks, although some new material is inbound at present.
That being said, yes the 50-135 is a nice handling zoom lens with beautiful workmanship and a joy to use on the Df. It combines very well with the 6T close-up attachment too.