The Comma Kit will save the day! For only $8, you get 72 commas to use as you please. Note: These aren't die-cut. They're totally DIY, or rather CIY: cut it yourself.
BUT THAT'S NOT ALL! These commas even double as apostrophes! Or go hog wild and double up for all-purpose quotation marks!
A comma kit is 4.25x5.5 inches and contains 36 commas. Printed by the lovely folks at Sticker Guy.