Outfit Not Found

For Morostide this year I'm dressing up as Tobias from the Animorphs series. The books, not the terrible show.

He's a boy who was beat up and it wasn't until he found out about an alien invasion that he became extremely tough. He trapped himself in morph by the end of the first book and it wasn't until the thirteenth book that he got his morphing ability back.

I decided to show him being in mid-morph. The bald eagle in the background represents Rachel his girlfriend whose bird of prey morph was a bald eagle.

I also tried to show his love of dinosaurs. I don't like the shirt but don't know about a dinosaur t-shirt. I'd like help with the background as I would like to have him being in a meadow while still keeping the moon.

Thanks for any help in advance :)