yes thats rite. they are options, costs around 2-3 hundreds. (yes i know they are not cheap) er.. there are 3 pieces, the back onces and the passenger is just place it on, only for the dirver's bit there are 2 holes and comes with 2 holders to clip on to the seat to make it stables.
u can try and call the honda dealers but dont think they will stock cos the Tyrpe R is not comin to aus nemore. but er i am sure u can buy it from one of the oz honda treader here.

cheers.