Thank you Ryan & Heмaњa for sharing.

What I have done is downloaded the Ship Mats and used Powerpoint to modify them as required. To do this all you need is one the images, copy & paste this image into Powerpoint, and edit as desired (you can even resize if needed). Then you can save the finished product as either a PDF or JPEG file. I think that the availability of Powerpoint is pretty common and it can be used for many basic imaging tasks.

Good luck.