She also needs velcro closures instead of laces, so that limits my choices even more. I've tried shopping online and many of the websites that say they have EEE actually don't. She's wearing slippers for around the house, which I guess are okay, but she needs something something better for shopping and other outings. Any advice would be greatly appreciated.
A google on "EEE Women's shoes" turned up a ton of options for online stores.
Here in MN we have a store called Schuller's and they had EEE wide boiled wool ankle booties with a wide velcro closure that I got my mom. A very sturdy slip-proof bottom. I must have done something good the day I bought them
because they were on clearance for under $30! I almost yelled "yippee!!!!" out loud.