Amazon has Deflecto Business Card Holder, Single Compartment, 3-3/4"W x 1-7/8"H x 1-1/2"D, Clear (70101) for $1.01 with free Prime shipping. No minimum.
https://www.amazon.com/dp/B000SHU…PDKIK
Select no-rush shipping at checkout to receive a no-rush shipping credit.