HI Erica,
The Petzl brand of gear is actually designed for caving - the headtorches have crossed over to mainstream use, as you need something pretty reliable when you're in the dark otherwise.
A google search will bring you up hundreds of hits -
http://www.google.com.au/search?q=petzl ... d=0CBEQpwUHere's probably a good information page - I haven't looked at it.
http://www.vicspeleo.org.au/index.php?page=equipmentCHeers,
eddie
Edit: Edelrid is the other specialist caving supplier - most helmets I saw were Edelrid.
(former cave rescue, but my gear's all gone, I stopped caving when my back started acting up.)