I think he's talking about the new TK KJW GBBR.
The Source (Radio Shack) does have Tetra duster...it's in the blue/white cans...the one by work usually has it in the electronics section (i.e. with the switches/leds/diodes). Freaking expensive...$20/can
Fellows and Grand & Toy (yellow...and green/white cans respectively) are not tetra.