You can get leaf liter from places like joshsfrogs and blackjungleterrariumsupply.
It is just Magnolia leaves, live oak leaves, or even sea grape leaves that ware boiled to remove parasites and dried out.
Your probably going to be happier with something on the medium or large size I think.
A dish or something with traction like Grif said should help with him getting in and out and if it is set down into the soil it should reduce how high the dishes edge is above the substrate.
Great to hear he is active...... has he ate something yet?