Sorry, i do not have any model or STL files of the props i am using. All of them are commercially.
First model was 7 1/4 x 5", cut back to around 170mm in the old duct
2nd was the same but cut back to 137mm in new duct
3rd is 7 1/2 x 8" cut back to 137mm. I also plan to test 7 1/2 x 7" and also cut it.
All have pinion drive, the later ones i also cut the hub to adapt to the motor to make it shorter. The better quality was the Yamaha branded.
Have a look here:
You can also try the plastic Solas ones, like Mat, i did not use them but thought about.