I recently got this over a week ago, and for those who are on a budget, and looking for a head/eye tracking solution, this might help out:
https://store.steampowered.com/app/2375780/Beam_Eye_Tracker/
It's fairly easy to use and uses a webcam (inbuilt or external, perfect for laptops and stuff) that you supply. The benefit is that it works like TrackIR, for like SF2 which doesn't have that many keybinds anyway, allows you to customize the keys and stuff, so you'll be able to use it in Strike Fighters 2. It works for other games too (I use it for Arma 3 and DCS World), and is better than trying to use some janky setup to get something to expand the horizons and viewing of game stuff. Just set it up, it auto detects your webcam and so on, so I would recommend it. The Demo is good, but the only issue I had after using it was that it didn't recognize my payment for the full version (which is 30 dollars before tax). It is Steam based, but if you're looking for a system to work with SF2, this might be the option for you.