The only wheels I can find in 14" diameter (2.125" width) are child's bicycle wheels, that will have low-grade hubs+bearing for certain, usually only 16 spokes, and probably low-grade (low-tire-pressure) rims as well.
You could lace in any hub you wanted, only using 16 spokes.
Alternately, you could drill 16 more spoke holes in the rim yourself for a 32-spoke hub. The spoke holes don't need to be spaced exactly perfect.
If you can use a 16-inch wheel/tire instead, then you are into the 305 size and you can find "real" bicycle parts. Not a whole lot of choice, but definitely better options.