I think you'd be lucky to get any kind of temporary ins at your age. The fact that your under 18 means you can't enter into a contract. I do sympathise with you though. Some companies let you fit a nanny black box to follow you around and base your insurance on your milage, times driven etc. I don't like the idea personally. I think the only way now is to look for cars in the lowest insurance group and run it for a year or two until ins is something like affordable.