Hi, www.maplin.co.uk and the item code A47FH will show you a small mag mounted aerial for the i3. £9.99. I have had one for the past 9+ months because of the heat reflecting windscreen on my Zafira. Reception is A1 because I have the aerial unit sitting on the passenger side of the dash right by the small quarter light window and it receives signals ok and locates v quick. You may have a Maplin store close by.