In reply to Vivvi: Hi Vivvi. There are loads of Mountaineering instructors that will be able to help. However I would suggest that you get together with a friend, as teaching people to lead is much easier if there are two students.
This is because one can belay whilst the other leads and is coached, and if you do this on multipitched or single pitched climbs then you can switch who leads each pitch.
If there is just you, then the instructor would have to belay, and its not something that many would be keen to do, as they can do nothing to check the runners or help you out and coach you from the ground.
Hope that helps.