Taglon 5L in lahore costs around 4000 from the dealership. Oil replacement charges from 3s are around 150. So that means they charged you around 1270 for oil filter.
1s for parts is available in Montogomery road by the name of Toyota Ravi, their shop is right besides Ravi Exchange. Their rates were very competitive previously, for example they sold oil filter for 850 the first time I bought from them, the next time they sold me for 900 and then for the next time they told me the price of 1350 which is insane.
I recently bought oil filters from a Rawalpindi 1s, Hamza Younas Autos, for 650.