Does anyone know the proper K&N air filter number for the DMC12? It took me 2 days to find a replacement air filter for my DMC12, so I don't really ever want to go through that again. In my neck of the woods (Canada), it is painful to find the original replacement air filter. Does the K&N replace the airbox altogether or does it simply replace just the air filter? Anyone have one? Please reply here and to jrobbins@xxxx Best regards, J. Robbins