If you can't find a 4E shoe, buy a 3E shoe like the normal Yonex 65z series, and get a shoe stretcher like the image I attached below. It's cheap, and I can personally verify that it has allowed me to wear 3E shoes comfortably, despite my very wide feet 4E feet. Just widen the tight parts of your shoe and leave it there for 24 hours. It's a cheap gadget, and believe me it will widen the range of your shoe selection for both on and off the court, it has changed my life for <$10.
hopefully this won't damage the shoe hehe. I usually losen the lace near the forefoot and tighten the lace at the top. It works a bit. Hopefully this is safe.
