Darksiders 2, which was recently delayed to August, has a collection of premium Avatar gear for the Xbox 360. We're not sure if "adorable" is a word we'd ever use to describe Death, but for 400 MSP ($5) the "Reaper Armor" is just about the cutest outfit (demonstrating demonic power) your Avatar could slip into.
Prices on the items and props range from 80 to 400 MSP ($1-$5), but there's also a free T-shirt designed by Joe Madureira available if you "like" the Darksiders 2 page. The shirts are limited by codes, so if you're jonesing for some Avatar swag better click on through to the other side.