You can use the Offline Store Locator and visit a verified electronics shop near you or directly buy these components online using the links below.
Arduino Nano/Uno
https://robu.in/product/arduino-uno-r3-ch340g-atmega328p-devlopment-board/
HC-05 (Bluetooth Module)
https://robu.in/product/hc-05-ttl-bluetooth-transceiver-module-without-button/
L298n (motor driver)
https://robu.in/product/l298n-2a-based-motor-driver-module-good-quality/
Motor (*4WD)
https://robu.in/product/300-rpm-bo-motor-straight/
Normal Wheels (2 or 4 depending on 2WD or 4WD)
https://robu.in/product/robot-smart-car-wheel-tyre-bo-motor/
18650 battery *3
https://robu.in/product/orange-icr-18650-2000mah-25c-lithium-ion-battery/
Battery holder
Battery Charger
Alternate links for some items that might be out of stock at Robu
Regular Wheels
https://robu.in/product/robot-smart-car-wheel-tyre-bo-motor/
https://robu.in/product/65mm-robot-wheel-grade-b-for-bo-motors-yellow/
https://robocraze.com/products/bo-motor-fat-yellow-wheels?variant=40193701183641
L298N Motor Drivers
https://robu.in/product/l298-based-motor-driver-module-2a/
https://sharvielectronics.com/product/l298-2a-dual-motor-driver-module-with-pwm-control/
18650 battery *3
https://robu.in/product/orange-icr-18650-2000mah-25c-lithium-ion-battery/
https://robocraze.com/products/18650-2200mah-3-7v-battery-cylinder-type-blue
Battery holder
Battery Charger
Black Metal Chassis (Body of the Robot to mount all the parts)
https://robocraze.com/products/black-metal-4wd-chassis-small-190mmx100mm
https://roboticsdna.in/product/advance-metal-chassis/
https://sharvielectronics.com/product/4-motor-metal-robot-chassis/
Tools (Optional since you can also twirl the wires tightly around the motor terminals instead)