Car Kit Coverter

I have recently bought a second hand car with a Nokia Car Kit already
installed. I believe it is the CARK134 kit. The thing is, I have a Sagem
MyX-7 phone which I am happy with.

I am trying to find a converter which will plug into the Nokia cradle, and
my Sagem MyX-7 phone, and allow me to use the kit or, a new cradle which
will work with the Nokia kit and my Sagem MyX-7 phone. I have identified
the cradle I have as an MCC-7.

Is there such a product on the market?

Thanks,
Kirsty.