Just in general, Naga, I'd suggest that trying to import tiger's claws will land you in CITES trouble. Most conservation groups are seriously worried about tigers going extinct, and while they're undoubtedly being poached, I'd suggest that no sword needs such fresh decorations at this time.
Crocodile teeth might be available from Australia (I'm trying to remember if there are legal kills of saltwater crocs), and boars tusks might be available from hunters or farmers.
A lesser, but legal, option is to use resin casts. These are prevalent in Native American costumes these days, replacing eagle and bear claws, among other things. They aren't genuine, but these days, there's a lot to be said for letting the animals live.
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