Honestly...we have no idea who would ever need this but it exists now. 
3D Printed "The Behemoth 510/14mm Combo Caddy" that holds an array of items including: Seventy Two 510 cart spaces, Twelve 14mm Glass Slide/Banger holders, and one Multipurpose Storage Space in the center that will hold items with a max width of 35mm and length of 35mm.
 
Other Colors Available By Request. 
Banger/slides, Empty cartridge, Device not included.
 
Item is 188mm Long, 188mm Wide, and 36mm Tall.