If you upcoming trip is still weeks away, check out eBay for some great stuff with dirty cheap prices, free or very inexpensive shipping charges. Just ordered & got 2 US plug adapter that will work for HK/UK 220 volt style "round" 2 prong plugs @ $1.99 each - extra ones for members of our travelers group going later this month to HK.

Also got 4 generic micro usb to mini usb adapters for 99 cents each (US) with free shipping, order arrived in 10 days upon Paypal - worked great. Motorola's price @ $9.99 each plus tax + shipping.

Probably will cost even less if I have time on our next visit to buy in person at the famous Golden Computer Center in Sham Shui Po, Kowloon and pick it up along with other gadgets, but I already saved quite a bit.