Hi welcome to the arena!
You can find information on restoring your Starshine in the Pony Corral. If you don't find what you need, feel free to start a thread there, maybe with pictures of the one you are trying to fix showing the flaws, and ask for advice.
If you'd like to share pics of your collection (especially posed during play by your 3-year old sounds fun), we like to see those sorts of pictures in the Pony Brag forum.
I don't know if we have any Starshine for sale here but if we do you can find it in the For Sale forum. Try using the Search tool and see what you find.
Hope you enjoy your time here!