K. K. Talwar Fabriks, just as the name suggests is an upholstery showroom. It's quite large and there are rolls and rolls of fabrics they've got lined up. You can find anything from jungle printed fabric to plain, and basic-coloured fabrics as well.
Price: INR 1,500 onwards
But again, if you're too lazy to head out, here are some online furnishing brands instead.