I don't if the 11" coil is the same as the Kruzer/Anfibio.

I doubt they will work as the Simplex runs at a different frequency (12kHz) than the Kruzer, but I've been wrong before.

I doubt that coils for their other detectors will work on the Simplex+. Dilek has mentioned that Nokta Makro will be producing more coils for the Simplex+ shortly, so that to me is an indication that no other coils will work. There is a chance they may work, but probably with much reduced results in performance.