for you, it all depends on your countrys rules on import goods.I dont know what rules India have.
Mainly its perhaps extra costs by import (taxes,eg) and perhaps documentation on origin. You may be asked to show original buyer cost, and such.
For the company who sends package, its extra work for international shipping by custom (extra paperwork, i, documentations, eg.)
192.168.100.1 192.168.1.1
In my experience its gonna be expencive foamboard... for shure a lot cheaper to get foamboard alike locally, and plans to cut out the parts your self.