Plastic Scale Models Kits are available online, one needs to assemble and paint it. Check any online scale model shop ie: Hannants, Hobbyeasy, Luckymodel, HLJ etc.
Arjun no kits are available and will be difficult to modify a Leopard kit, Shivalik no chance , currently working on a 48 scale Sepecat Jaguar. And have loads of built kits some posted here on PDF
http://www.defence.pk/forums/military-photos-multimedia/122937-hobby-models-thread.html