used a Quasar remote kit on Nena and this week installed my Christmas present from Sarah to the new Nov - a Quasar 'Lewes' remote kit. Key differences were that it came in a nice protective box to house the circuit board - just need to cut cable access holes. Box has mounting lugs too. Remotes sensible money too for spares. Maplin are doing the kit, but seem to be running down stock on spare remotes. Lots of other suppliers out there - expect to pay £40 for kit and 1 remote.
i chose it over my last kit as remotes have a slide down cover over buttons - less chance of accidental triggering when keys in pocket!
easy to set up, took me just 15 mins