If its wider angle you want then get the Original Panasonic 0.75 wide angle converter (DMW-LWA52. You also need the aluminium tube convertor DMW-LA6). The LWA52 is a very high quality optical glass convertor and there is absolutely NO degradation in image quality. I have used this on many overseas trips and the colour reproduction is amazing, especially blue skies and green grass/foliage as it has an inbuilt polarizing coating. Do not waste your time on cheap third party wide angle lenses. They are almost always (or i should say Always) of poor optical quality and WILL degrade your image quality. Pointless.
The LWA52 is about $280 and the adaptor about $50. You might be able to get cheaper online. They are to find locally as even the agent does not want to stock them.