The question doesn’t specifiy what druid form “transmog”. And there were 6 bear forms available from Legion, one can no longer be obtained but the other 5 can still be obtained.
Just get to level 98-100 and you’ll get the artifact, and at the artifact forge you’ll have information how to obtain other forms. You can also check wowhead for more details. They will be availble as transmogs with the weapon(bear paws) when you get to 110 and leave the Legion behind.