anyone know where can i buy like the inserts to put into other non camera bags so i can like just put my camera in them? cause i'm using a trolley bag for classes (i'm a student pilot) and i'm way too lazy to bring two bags along lol. and i don't feel secure putting my camera just in the bag like that cause while pulling my bag the camera will definitely "jump" up and down inside.

i've been to like 3-4 shops asking for the camera bag inserts they're like ? camera bag inserts?