I really like the new Dewalt "Tough Cases" they use the same dovetail system for inserts, but now they have a clear side and can lock together. They are also compatible with the new Craftsman cases
This is an insert that fits into one of these cases to hold T-shank jigsaw blades.You can fit up to 20 blades into one insert.
I've included openSCAD and STL files. The SCAD file really isn't ready for Customizer so I have disabled it, but I've included it if you need to tweak the fit. The dovetails aren't perfect, but they print well on my printer.
Here are some purchasing links:
Dewalt Tough Case at Home Depot
Craftsman Case at Lowes