After searching for a while, I found the model of the Sun Sword in The Curse of Stradlater shared by Reddit user /u/Akoloutheo77. Without a doubt, this is the best model I've ever found.

• A rod-shaped model with a connecting component has been added.
  • You can choose to buy a 200mm x 10mm steel hexagonal rod
• Added some gemstone models for the sword hilt and the main guard.

For the handguard part, I recommend printing as slowly as possible. There are many small parts