This is probably in the wrong forum as it sounds like you're wanting a controller for an SR20 in MS Flight Sim.
Anyways - there isn't one on the market
afaik, your best bet would be to buy a yoke unit and possibly a joystick. Cut the yoke off the yoke unit, and replace with a part of the yoke or the joystick grip provided you can find one which suits.
With a bit of careful modding you should be able to build something that works like an SR20 stick would would work in real life.
I'd go with the CH yoke (but not the one with all the buttons on it - the original), rather than the Saitek which has the LCD etc which will just add complication if you're removing that part.