If you have some difficulty in procuring the equipment (accessories) locally, may I suggest you to look up major online shopping portals? Yes they would be a bit pricey, but you can always consider more affordable options such as http://www.automotix.net/accessories/ which deal in bulk as well as single piece delivery without any shipping charges!

I share this out of my own experience since I had ordered some for the truck like - rear view camera, reversing sensors, auxiliary fog lamps and many off-roading stuff too.