https://www.jetpens.com/Delfonics-Carrying-Bag-M-A5-Dark-Denim/pd/37102

Delfonics Carrying Bag - M (A5) - Dark Denim<br /> $36.00

Perhaps a bit large, but could be used as a mini-portable office to hold a variety of things including 4 x 6" index cards for work on the go.

https://www.jetpens.com/Delfonics-Carrying-Bag-S-A6-Dark-Blue/pd/38393<br /> Delfonics Carrying Bag - S (A6) - Dark Blue $32.00