This site actually works out of a chinese one so don't be fooled by the name http://www.ecom-power.com/index.php/language/en

Bought an ac adapter for a mini DV but it was the wrong one and when offered to swap - has so far taken 4 goes - each one promising and not delivering, a response within 1 working day. Last one got a response from someone called Bella (!) who has now gone strangely quiet as well.