Bought the Apple Lightning to Micro USB Adapter from Apple Online Store (Singapore) for S$28. Initially it was only available in Europe as in Europe if you are selling mobile phones, it has to come with Micro USB connectivity. But last Saturday, in a surprise move by Apple, they decided to make it available for all.
I don’t think it is out in retail stores yet, probably in a week or two, but I expect it to be out of stock the moment it is available in stores, like what happen to the Apple Lightning to USB Cable.
It is difficult to get the cable during this period as it is out of stock almost everywhere as everyone is rushing to get a spare cable for their car or office, and Apple Online Store lead time is 2-3 weeks!