Well, it turns out that the font I was looking for isn't Compressa Compressed Bold. Heh.
When it comes to the Voya Nui Font, Takua Nuva from Der Chronist message boards helped me and gave me the photos of the special characters from the German alphabet. However, the quality of the pictures is quite poor, there's also one thing that bothers me - the letters submitted by Takua look like a different (perhaps earlier) version of the font. For instance, the shape of 'A' doesn't match the shape of 'Ä'.