HD Theater 300 Power Supply

[Oddity]

I live in the UK and have just purchased one of these units and as I believe the power block is directly attached to the mains plug pins, I'm looking to buy a power adapter with a UK specification three pin plug. I know that I need a 12v 2amp unit where the outer rin is +ve, but can anyone tell me what the output plug size that goes into the HD theater is?
I don't want to use a travel adapter to convert the supplied unit, thanks for any help in advance.

[Nelbert]

The plug i'm using on the maplin psu is the following dimensions:

5.5mm outside
2.5mm inside
12mm length

The HD300 PSU is Centre positive: ie tip = +ve not ring

Maplin are currently have a multi-adapter (notebook style with detachable mains lead) for £20 instead of £35, it's a 60W switchmode AC->DC with 8 switchable polarity adapter plugs.

[Bagal]

I purchased one of these http://cpc.farnell.com/sunfone/acw02...09?Ntt=sunfone which seems to work just fine

[Oddity]

ordered from cpc and all working fine.