The guy I do this work for designs all sorts of magnetic signalling and sensing equipment mainly for the Oil and Water industries, a lot of the stuff is prototype so that is why the versatile machine was needed. Dont think off the shelf coils could be had, especially with the type of cores these have, although I certainly dont know much about the coil industry.
I know he can get coils wound to his specs but for ones and twos its not cheap and even once a design has been finalised its still cheaper to do in house.
Hood