pretty much the same ones...Either JTRacing guards or some other vintage MX face guards.
The difference between mine and the one in the above pics is that... that guy snaps the guard directly onto the outside of the helmet.
I like to snap/connect mine onto the leather lining/ear-flap that only exists on a few makes of 3/4 helmets.
Ive found that only helmets made by: Skidoo, Bombardier, or LSI have the internal leather flaps that you can snap the guards onto..
Incidently.. I just bought this one on ebay last night:
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=320442319636&viewitem=&sspagename=STRK%3AMEWNX%3AIT
that I will put on this helmet: (notice the leather ear flaps inside the helmet...)
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=110450479295&ssPageName=STRK:MEWNX:IT
But here are a few JT Racing guards that was just listed on ebay:
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=220505823204&ssPageName=STRK:MEWAX:IT
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=220505823700&ssPageName=STRK:MEWAX:IT