I've only seen ones in pictures that enthusiasts have built for themselves. Its not out of the question to build one, I am "guessing". For example, the stick on a Spitfire looks easy to reproduce.
I "guess" one could buy a cheap stick (like the Thrustmaster Flight Stick X that sells for under $30 in the USA) and use it for "active" parts. A trip to "Home Depot" (in the USA) for raw materials, "maybe". But, I've not done it -- so this is just speculation. And, one does have to be "handy" with tools -- or willing to "try and fail". Thing is, on something like this, trying and failing does not have to be real expensive (under $60, I guess) -- maybe worth it for the "education" to a person who has the time to spend.
Crossfire 2x Sapphire HD7970 OC - Eyefinity 5760x1200 24", 1xDell-U2410 H-IPS + 2xHP-ZR24w S-IPS, Ceton InfiniTV 4, Piledriver FX8350@4.6GHz w/Swiftech Water Cooling, 16GB GSKILL PC3 @1866, ASUS Sabertooth 990FX, OCZ Vertex 4 256GB SSD, 4x Seagate + Hitachi + 2x Sg Ext = 12TB, Lite-On DVD, OCZ ZX 850W PSU, CoolerMaster HAF922, TM Warthog HOTAS, TM T-Flight Stick X, TM Cougar+FSSB & CH Pedals, Saitek X52 Pro & Pro Combat Pedals, TrackIR5 w/TC Pro, Windows 8 Professional 64b