Skunks are not rodents; they belong to the weasel family. Incidently, it is very rare for a rodent to get rabies.
The very low incidence of rodent transmission of rabies in the US does not mean they do not contract it.
Agencies which test for rabies often refuse to test squirrels and other small rodents.
First of all, rodents who are exposed to the disease are usually killed by whatever predator would give it to them. When they are infected and still survive whatever attacks them, they die of the disease much more rapidly than other animals infected. Bats, for instance, live quite a while after infection which makes them more of a transmission problem. There are other mysteries to the why small rodents rarely transmit, I wonder if it's their relatively short life cycle in general--but assuming they are immune is not a deduction to make. Groundhogs for some reason, transmit a lot of rabies.
The animals that commonly transmit rabies all have different cycles of infection, transmission and death.
An exotic imported for pet fanciers would be a complete wild card.