Do they by any chance sell newt eggs?

I do not believe so but they do have hatchling tortoise

I've seen tadpoles from many species of frogs. With newts I've seen they sale them when they grow a little bit,not really eggs, but you can always call and ask ,a lot of species breed at specific times of the year so they have a wait list if you're really interested.

I didn't see any sort of eggs when I was there. Just young lizards of varying species