Hello, sorry I do not know that area at all, but I have a few suggestions.
Apprenticeships.org may be a possibility, contact connexions if you are under 19 as they may be able to point you in the direction of further help, there is a company called babcock international (formally VT training) which may be able to place you in work based training up to the age of 25 last time I checked, be careful though as if you sign up to any of their training, you are tied into the company you end up working with for a certain length of time, if you leave early you may have to cover the cost of any course you take up. I would say a good point of call would be to use yell.com, do a search for garages etc in and around areas you are able to travel to and just give them a cold call.
Hope this helps