I found a similar adapter to habril's micro-b male to usb a female in post #32, but from a U.S. reseller.

Here's the link: http://www.twstore.com/gcusbafzm.html

I don't have one yet so I can't confirm if it works and the shipping brings the total cost to ~$16, but it might be a good option if you don't mind switching to host mode with software.

Edit: Just received in the mail and can confirm that it works.