Yes, but JPN CN/sky3ds are about the same price and they aren't that cheap. So first you would have to get one of these cartridge, then you have to take a risk to update (it might update to 10.3), then you can use entry point for autoboot. You can try if you can bear the risk.
Given the prices of CN or Sky3ds, I'm considering sending it to a third party who is able do the update based on what he's said. should something go wrong, I know he's capable of undoing the damage.