99% of factory towbars are made here in Australia by Haymen Reyse (check spelling) and rebadged by the car manufacturer I would ring a local towbar installer (most 4wd centres) and get a price from there.

They are generally 3 times the price I have found.

Also if you can rebuild a pinball, then installing a towbar is a piece of cake, a good afternoon's work really. And if your not 100% with the wiring then drop it off to an auto elect to finish off.

The box/module that they are talking about is not generally needed, but check with the auto elect.

The car manafactures always tell you need them, so when they install them it is a matter of plug n play with the wiring.

You could also get a price from the spare parts department of the car dealership on the module.

Cheers Angelo