He has a lot of choices. Put the below strings in the search box on 3ds.essh.co.Skylanders Giants is 99 cents at gamestop. Use it to upgrade the firmware to 4.1. Works well, I used it a while back to upgrade 2.x firmware to 4.1..
Several others have 4.5 firmware. Check at http://3ds.essh.co/
I recently saw it in a post here also, too lazy to find it.