Emergency situation... Anyone have a Smart car tyre/wheel?

[JD]

My Uncle's smart cars rear tyre has popped, on today of all days, leaving his car stranded at our house

It's a longshot, but does anyone know of anyone who has one?, of course willing to travel and will pay good money for one

175/55/15 continental Eco contact

A wheel with tyre would be utterly fantastic, as it would obviosly avoid the fun of finding a tyre fitter in the holiday period

I'm in chelmsford

any help/links/tyres seriously appreciated!