HPI/HB dont but there are a few manufacturers around.
3 racing make them and i think Jet also make them (Pro 4 C Hubs are the same).
In my opinion though you are better sticking with the carbon graphite C hubs.
Note that the Cyclone S C-Hubs are different and they are ridiculously brittle
Aluminium C Hubs tend to bend and then this tweaks the car without you being able to work out what is wrong.