There are plenty of such people in the market. These metal bumpers are easily repairable and sellers telling you that they will import them for you is just crap they wait for a scrap car to turn up and take those bumpers out and tell you that they have sourced them from abroad. There are plenty in Shershah Karachi if you have someone here you can ask him to get them for you.
Same thing happened to me while i was searching for the bonnet lid for my Lancer a guy in shershah asked Rs 20000 for the bonnet and in the very same market i bought the very similar bonnet from a different guy for just 3000.
This restoration process will teach you a lot. i mean a lot.