Enough said. Mine didn't came with it but I buy it directly from Honda. 24 euro (ouch).
I thought about putting another one in the other side, but due to the high price and the fact that I never lift the bike from that side, I left it with only one as it came from the factory. As they've pointed out, many people ended up with bent seat pants for grabbing the seat in order to lift the bike.
Raul