Well you can spawn in vanilla fertilized eggs. Problem is there is a bug associated with vanilla fertilized Wyvern eggs, they disappear when you drop them. I had hoped this mod would place allow wild dinos to mate so I could go in and steal their eggs on maps other than SE, but so far I have found no eggs period.

http://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=842678491&searchtext=Scorched+earth

here you go this will allow SE creatures to spawn on the island you wont need SE dlc either.
there is also a mod on the pages links that allow you to learn SE engrams

You can spawn wyvern eggs on the island, just make sure you have an ample heat source when you drop the egg. Place about 13-14 standing torches in a semi circle, light them up and drop the egg in the middle, it shouldn't disappear .

there is a mod that adds wild dragon nests that function the same way as the ones on the original dlc. i believe it is SE plus or something similar. im sure you can find other mods that do the same thing :)