You could try the Cesnna agent in UK. This way you will get the actual manufacturer's Pilot Operating Handbook for the type. This is important, because there are many flying school published versions which invariably do not follow the drills and techniques published in the manufacturer's POH for the C150 or any other training type. As an example, many schools teach a go-around (rejected landing) procedure that is at quite some variance from the procedure stated in the manufacture's POH.