1229.
Alternatives to the standard belt with additional slots that provide a decent encumbrance reduction, but are limited to specific items and utility. Some examples might be:
A tool belt for carpentry, mechanic and metalworking tools (perhaps a nerf to equip times when using tools as weapons). Edit: I have just noticed this is in the workshop mod
Survival/Farmers belt for knives, small axes, trowls, seed bag and those new belt equipable canteens and firestarting equipment (mentioned in one of the recent thursdoids).
And perhaps a police belt with a slot for a baton, a gun and perhaps a slot for a magazine or two (Might want to make it belt and holster replacement)