I have just installed the ute lid locks from lidlok - see
http://www.lidlok.com.au. Excellent addition, they work from a separate remote, which I prefer, so they can be activated separate to the cabin etc. Two remotes are supplied with the kit, one is with keys the other I stuck under the steering column with d/sided tape (supplied). An l.e.d. is mounted in the cab which indicates when the locks are closed or open. I bought the kit direct from the supplier in Melbourne (East Keallor)for $435 (great bloke,very friendly & helpful0 - took me about 3-4 hrs to install, very classy stuff,wellmade,all the gear is supplied -best $ I spent-no more pissy little keys.