There are still plenty of infrared films available. Kodak HIE was not the only one out there, although it was one of the weirdest and thus most appealing to me.
Not all cameras can use all IR films. Some films (Kodak HIE was one, and I believe Rollie make another) have no anti-halnation layer on the back. This is what gave HIE it's trademark glow, and such films will not work on cameras which have:
- A viewing window in the film compartment (could cause the film to fog).
- An infrared frame counter which counts across the sprockets (will cause the film to fog in from the edge about 5mm into the frame)
- An infrared date printer (yuk, who thought this was a good idea anyway?)
Everything else should work just fine, and even these models can be used on many infrared films.