Hi! I am now looking to change my Dynamo over to a Alternator! I have looked thro "Rimmers" (Too Expensive) "Canleys and James Paddocks" Is the any other online Stores etc I can look? I was looking at a 65Amp as I want to fit a Cassette/Radio, plus Fog and Reversing Lamps? Would this do the job? or a 18ACR 45Amp?