Did you search ebay?Im finding it near impossible to find a USB 2.0 Micro-A male to Micro-AB female cord. Especially in a shorter length.
http://cgi.ebay.com/Micro-USB-Male-Female-M-F-Extension-Charging-Cable-/170605200718?pt=LH_DefaultDomain_0&hash=item27b8dcc54e#ht_1470wt_1139