Alloys for Corolla

I have a 2 year old Corolla HE and would like to spice it up alloys.

My budgest is Rs.20k.

Can someone suggest some reliable places in chennai to buy alloys? I don’t have much clue about the right alloys for my car. What are things should I be careful about?

Toyota alloys for the same car will cost me Rs.50k is what Lanson says, is it really worth paying that much for stock alloys?