Guys where can I buy plexiglass sheets in India from?

Requirements:
Area: 400 sq cm of any dimension (preferably 20cm x 20cm), multiple smaller ones will do.
Thickness: 3mm-5mm

Need it to make a few small parts.

City's I can visit: Mumbai, Anywhere in Goa (Preferably)
How much would this cost?

Also known as acrylic sheets. Easy to find, go to a local framing shop or vehicle number plate shop, plenty of them in Grant Road, Mumbai.

if u want acrylic sheet visit dadar near portuguese church u will get all types of acrylic sheets in the nearby shops there is a big shop for acrylc sheets

also acrylic sheet costs around 1000 rs for a 2mm 8x4 feet sheet or less amount check with the shops in dadar

I'm also looking for these sheets in Bangalore. Any ideas?