Make your own Pilot (or First Class in Economy Class)
As my personal item, I attach a packing cube shoulder bag to the rear of my co-pilot with two NiteIze #1 S-biners. Since mine are both steel dyneema, they look like one bag, but other color combinations could be used. The dimensions of the combination still meet (AA) requirements for a personal item. I can then take off the packing cube shoulder bag and attach it to the struts at the rear of the tray with two larger hooks (I use metal shower hooks for this). This makes a handy in-flight pouch that is usable with the tray up or down by slightly adjusting the hooks. The packing cube shoulder bag can also be used inside the Co-Pilot if the additional space is not needed.