I have 13 cases of Kraft #7 Bubble mailers from staples. 10 dozen 12packs per case. They sell for $13.49 per 12pack in Staples.
size= 14.25"W x 19"L Peel & Seal Bubble Mailer, #7, 12/Pack (51595-CC).
I will sell individually by the case ($80per case), but will make a great deal for you if you purchase all.