My used Alko lozenge came from a Swift dealership, and the lock barrel from Ebay so quite a cheap purchase overall.I managed to buy a second hand Alko from EBay which I used at home along with a Milenco. I thought that 2 x locks plus 101 other devices would be mandatory when we had the twin axle but the CAMHC insurance was quite relaxed, you only NEED certain devices if you claim the discount.