Good 7-inch multirotor propellers, where are you?

7-inch endurance FPV drone is my new thing. There is one little problem tho: good 7-inch low pitch efficient propellers. The choice is that there is almost no choice at all! The list of 7-inch propellers with a pitch or around 4″ and preferably 2 bladed (efficiency) is as follows:

And I already know that some those above are total crap!

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