Do the sockets fit? Going from 180 to240w should be fine. As long as the expected voltage match on the brick’s supply it should be fine to go higher in wattage.
In terms of wattage, it’ll only draw the current it needs.
In any case you can probably find a 3rd party brick that works just fine for way less. If you have a microcenter near you, they can help. Or there’s always crapazon.