The Panasonic 45mm and the 8mm lenses are not really the most popular lenses. The problem is not their quality but the very high price. But it looks like Panasonic is recognizing that and the price is now much lower than it was a few weeks ago:
The Panasonic 45mm f/2.8 OIS macro:
Amazon (Click here)
The Panasonic 8mm f/3.5 lens:
The original price was $799 but you buy it now for $739 Amazon
As usual we europeans do have to pay a much higher price. That’s why I usually my US friends to bring me some nice lenses from there when they visit me in Europe :)