Sony center, impulse gaming, heavy arm, gamers hideout, m4u. Anyway you basically can buy from any store. Most of the store are local warranty or you can buy from online such as Lazada, 11 street

Not much. You can go Sony centre there. Another one is ground floor near to the entrance to sungai Wang.

Or level 3 viewnet inside there is a seller name Wai who sell.

Or level 1 near to the escalator.