Yep, thanks, I've seen the kind of thing you're referring to.
Looks as if I might be able to use some bits of wire from a coat hanger to do the same job....correct me if I'm wrong.

I want to be sure that removing the radio will give me the required access to the heater blower switch though, before I bother removing the radio. Can anyone verify this is the right route, or should I be trying some other method of access?