|Without looking at the many possible options now (on an ipad and on the go...) don't necessarily buy cheapest. Invariably one gets what on pays for...?|
Amazon have them; Neet being one brand; customer reviews seem generally OK.
Wherever you buy it, ensure you get a decent warranty, if possible the option to return it if it doesn't perform as you'd like. Amazon are usually OK in that regard (at least from my own experience).
message edited by trvlr