I do have some in my 4shared file in the link in my signature. Look in the "porthole art" file.
First, save all of the images you want to use to your pictures. Then make or print out a round circle that is 7.5 inches. If you print the one I made, make sure you measure it to ensure that it is 7.5 inches across. Then print out the ears, trim and place them on the round circle to ensure that they should fit on the porthole, and do the same with the hats.
I have not been on a cruise to see if these fit, but have seen several postings on the Boards that the "porthole #" is 7.5 inches. Since I have not personally been able to try them...I always suggest taking a pair of Scissors just in case the 7.5 inch number that I have read on the Boards is incorrect so that you can trim the ears and hats if needed.
I hope all of that makes sense. Have a great cruise!