ADHD Helmets? Sounds like something to keep hyper-active kids from hurting themselves.
You're talking about fencing gear, right? Do you mean sport fencing or historical fencing?
Triplette Competition Arms / Zen Warrior Armory has some affordable stuff. KoA (kultofathena.com) has some of the GDFB armor/helms/jacks if you're talking about heavier stuff.