I decided to model and print replacement blades for my Ryobi 18v One+ Whipper Snipper (aka Line Trimmer). Even printing using PLA filament, I was pleasantly surprised at how well they worked.
If you do decide to print some of these I recommend printing a bunch as you will go through them quickly depending on the state of your lawn/garden (eg, rocks, sticks, etc).
The author marked this model as their own original creation.