I'd recommend the Hot Fix Films "Metallic" product, as they offer a number of colors, including Orange and Black. You can buy this product in a roll, or by the foot if a small amount is needed, from Specialty Graphics.
It's my opinion that if you're looking for another Glitter material in those two colors, Hot Fix Films sells one of the most attractive product of this kind called, you guessed it, "Glitter!" Specialty Graphics sells this as well.
My bad it was actually the holigraphic foil I was looking for and the company you suggested had it. Also, the company Specialty Graphics carries it in the orange and black. Speciality Graphics also had a lot of glitter too.
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