> I take it you have none with a UK input voltage?

I have a very small number of the IEC units available - they're not for sale, but I can swap one for a US power supply. email me.

Alternatively, got to Maplins and ask for a 'Sunpower MA15-150' - I think they're about £25. A plug top version is also available, I *think* the part code is MA15B.