I have a side loading motorcycle trailer from Armitages. The trailer is fitted with a cast coupling known as Triple Lock, for which I have only one key. I decided for peace of mind I would get another spare key; a number can be found on the key. I contacted Armitages, no luck. I managed to determine that the item is known as manufactured by Bradley, no luck here either. On inspection, I found the coupling casting to have Indespension cast into the item, presumably Bradley supplies the item to them. I then contacted Indespension and quickly received a Telephone call to inform me that they were able to supply a spare key. Amazing I thought, then the caller informed me the price £36, plus postage. The caller probably heard my gasp for air, before asking him if he was joking. I then replied that I would then pass on this, thank you. I think I will instead just be careful with the key and in the worst case scenario, disable the lock. What an absolute rip-off !!!