For branded screen guards you can check the e-commerce websites. For example, visit flipkart, search for 'screen protectors', and apply filter on 'Moto E'. You can get good deals on branded screen guards. This is an example only, you can visit other websites like amazon, snapdeal etc as well.
Just a word of caution,do check if these sites are delivering it free of charge. Normally if the orders are not above some particular amount, say Rs. 500/-, they will charge you some delivery charge as well. In such case buy the screen guard while buying other stuff, so that the cart value is over the minimum amount for free delivery.
Hope this helps!!