I think if its part of your culture then by all means do it. That said, im sure that your country does more to protect these animals than most, being that you want that part of your culture to last a long time. Im fairly certain, that the permits and such required to harvest these animals is directly reinvested into the resource.
I know that here in the US, any item sold that has to do with hunting or fishing ( guns, ammo, rods, lures, bait, clothing,boots,knives,calls,scents,boats.....you get the jist) is subject to the Pittman-Robertson Wildlife Restoration Act of 1937, which requires the manufacturer of said items to pay a special excise tax, that goes directly into Wildlife Restoration and Conservation. Sportsman, and Fisherman are the largest contributers (money wise) to wildlife restoration and conservation here in the states.
I have a whale foreskin that I got as a gift.
I can pull it out of my pocket, give it a shake and use it for a duffel bag...
And if he rubs it just right, it grows and he can use it to cover his Jeep