It appears that the 1072 nm range is critical for penetration. However it does say: "According to a yet further aspect of the invention there is provided a radiation emitting means in the manufacture of an apparatus for electromagnetic radiation therapy for use in the treatment of neurological and/or psychiatric disorders, said means for emitting electromagnetic radiation being capable of emitting radiation having a wavelength of from 980 to 1350 nm. "

I was a former computer and electronics tech, and I am currently a medical student. I was unable to search for the LED through normal means. Most manufactureres use 800-940nm as their standard IR LEDs. The standard way of locating an electronic component is through: thomasnet.com
However you might need to order a vast amount from them directly.

If you do find an IR LED in the right range, please post the source. I will continue to look for one since I am interested in prototyping one for an experiment.

Nakandakari

P.S. It might be that they used LEDs from Britain givene their location.