@ rohit, the whole setup costed me around 900rs as bulbs and relay costed around 700rs and 200rs fitting charges and i got it installed at and by MASS guy only.
For armrest i dont know the company's name as it all comes imported but it is a perfect fit for our car with matching colour.
For LED strips i dont think warranty may void as they do not cut any wires, they just attach it in the current wires.