I bought these from Kinari Bazaar in Delhi. However, you can buy a different version of these from the link i have provided below www.amazon.in/Homesake-Crystal-T-Light-Plates-T-Light/dp/B01MSVP1XB/ref=mp_s_a_1_11?dchild=1&keywords=crystal+diya&qid=1605859707&sr=8-11
These things are not expensive. The most expensive item here is the stone chain. However, I cannot comment on the prices since different craft stores sell them at different prices.