Post cards and stamps

Hello, does anyone know where I can buy post cards(with Indian cultural themes and embellishments) and stamps? Are there any stationary shops or souvenir stores that you are aware of? Please do let me know. (PS- before anyone suggests to look online, I tried and most of them are exorbitantly priced or do not live up to the themes that I’m looking for. However I’m open to recommendations if anyone has any)