It's only about $500 from nengun, then a bit more for the looms. They say they have an S1 Stagea compatible version, so I don't know why I'd need to hard wire it. I'm in Bathurst, so finding someone to install it is the hard part, I'll probably have to take the car to Sydney.
I'm not after a high powered solution, just something better than what I've got now (nothing) so I might end up getting the standard e-manage.