If u don't have many Ambers ..then if u have any Dinos more than one in inventory u can scrap that ..like u had 3entelodon but when you completed it it was only one ,so before that u can scrap 2piece and the complete that ....is a tip
Best way to get amber now is through the Club if you get a high rank. If you want to complete the Dino, it is better not to scrap. Because like entelodon if you scrap one piece you get 1000 but you need 2000 more to complete it. I always try to finish one and have at least one piece left for the second one.