How does one build a PC-15 Axis inverter?

[tripletopper]

To make a long story short my Xbox Adaptive Controller could make many adjustments I want.  The one adjustments I can't make on either the Xbox adaptive controller or the Xbox operating system using the accessories app is X-axis flipping.

 

I have gotten a PC 15 flight stick working with the Xbox adaptive controller by using a pc15 USB adapter. 

 

If there was such a pre-made device as a PC 15 x-axis and pc15 y-axis flipper that would be a perfect thing for me, (assuming it's in my price range)

 

I understand the pc15 standard is some sort of analog standard which just uses uncoded intensities of charges to represent a value between 0 and 255.

 

This is a lot trickier than say a Vectrex analog inverter, which uses separate pins for north and south and east and west, where a pin swap adapter would be the correct answer.

 

I want to see if there's a pre-built / ready to order x axis inverter which has a male pc-15 and a female pc-15 and has the circuits to flip the X correctly.

 

Also might be interested in the y-axis version of it.

 

I know it's harder than a pin swap adapter.  I've ordered pin swap adapters from custom places and they acted predictably.  I just want to see if there's a place where they have pre-built x-axis flippers for pc15.