I only have a template I created for the "blade" that is generic. It doesn't include the cut out a the bottom or the part for the handle. Those things depend on which handle you use. It will give you some idea of what to do. If you print it this should be 7" across the bottom and 9" high. This is what I use but there are plenty of other shapes and sizes being used.

Also take a look at this thread. There is a ton of info found here. It gets more refined as people try new things at the end of the posts but read through it one night and you will get the idea https://forum.moomba.com/showthread....n-Moomba-boats