Is there a method for purchasing additional laptop chargers after buying laptop, I can't see anything obvious in my account options or on the site itself?
If you go to your dashboard on the main pcs sight, at the side it should have an option to upgrade your existing pcs pc. Then select your order and somewhere on that page there should be the option to get a new charger (it might be in the chassis options)
I know when purchasing you can choose an additional charger in the configurator so the option is there (certainly for 'new' purchases) - I'd recommend getting in touch with PCS directly to see if they have any in stock