I exclusively use Gator G6 blades to mow 30 acres per week with 3 different mowers. They do a fair job at reducing and dispersing clippings. They are also heavy duty, keep an edge, and last a long time with regular sharpening.
My last set were just replaced after 700 hours and about 20 sharpenings -
Enter your mower blade part number from Kubota into the Oregon cross reference, but a quick view looks like Oregon 92-123 may be the correct blade (confirm!).