My know. But my intent is to only say the PS90 is semiauto only no matter the generation of the trigger pack.Never surprises me at what people will say with no knowledge of what they are talking about.
I don't mean to say anything more or imply anything more.
OP, I just did a quick check online for the safety switches and only the FNH OEM P90 three position switch is there.
From this, I sm hazarding to say the $100 option is the only option.
Three position switch + your Gen 3 pack = semiauto only on both firing positions.