Upload & Sell: Off
I found a reader that is close enough. The Transcend RDF5 reads at full speed (>90MB/sec.) with the Sandisk 32GB Extreme Pro UHS-1. It has a small slot for the micro SD xx cards, but that is just a separate set of contacts so there are no extra drive letters. The only possible complaint is that the slots are on the side, so a protruding card might block another port in some configurations. For less that $10 it's hard not to like this reader.
BTW, some background is that the internal reader in my laptop does not like the UHS-1 cards for some strange reason. For example, a 95MB/sec. card only reads in the low 20MBs/sec., whereas a 45x card reads at clsoe to 60 MB/sec.