Looking for a solution for dividers

Hey gang, i recently went in to re organize my 3 drawer packout and i ran into a want that i cant seem to find any solutions for online, im not very well versed in the 3d printing space and essentially i want to lay out my packout like this but i want the 2 smaller dividers to connect, whether its through one single piece or a joiner of sorts, does anyone have a solution for this or know where i can get one made via 3D printing etc.

https://preview.redd.it/2jggo3woh1cg1.jpg?width=4000&format=pjpg&auto=webp&s=ada8b9fd8a5cd7c5fcb223e149bc61daef9f4cf8