Getting back to the subject of universal adapters, I received the adapter at http://www.amazon.co.uk/gp/product/B00R
... ailpages00 today, from Germany.
It is tiny, as you would expect from something that fits inside a male USB plug, and comes in a standard SD card case with foam insert. The fit to the Linx is tighter than the fit to the USB stick, so when I pull out the stick the adapter stays in the Linx, so I shall have to pay attention and retrieve it. I imagine it would be advisable to try not to touch the contacts either, they will work much better clean.
The adapter certainly works, within a couple of seconds of plugging it in I had an Explorer screen listing the entire contents of the USB stick.