Here is a 16gb microSD with adapter. It is slow though. All 16gb microsd's that I know about are slow. There are few choices available at this size.
http://www.newegg.com/Product/Produc...82E16820220379

Here is an 8gb microSD with adapter. It is fast. There are many more choices available at this size.
http://www.newegg.com/Product/Produc...82E16820211342

You could get about 4-5 of the 8gb cards for the same price as the 16gb. If you don't mind switching this might be an option.