Correct - the manual steering wheel is built differently to the DSG one. The DSG one has "hollows" in the arms or spokes of the wheel and the wiring is there, so literally plug'n'play. Manual steering wheel means having to buy a whole wheel with mfsw already fitted. If you want ED30, you have the option of buying a GTI one and getting it restitched.
Definitely rare. I've been in the same situation but at £400+, I've not bothered in the four years I've had the car.