you can buy it from a tools shop - costs about 1000Rs - for a petrol engine one, just swap out the gauge with a nice european one, the asian ones dont last that long.
My diesel tester cost me Rs 6500 just for the gauge and adapter as in the diesel you see about 500 psi on a 1.6l VW with 23:1 compression
Its worth its weight in gold - I cant count the number of times Ive used it, and saved a number of rebuilds