WANTED: 4 wheeled collapsible cart

I'm hoping someone can donate a collapsible four-wheeled shopping cart to me for grocery shopping. I'm a 60 year old on disability, take the bus, and the latest shopping cart I've been using had a wheel fall off. I fixed it temporarily, but it's on its last legs, so I could use another one before this one packs it in for good. The carts that work for me have baskets that are about 17" wide, by 15" back-to-front, and 21" tall, in order to fit the plastic containers I use to hold loose groceries in. Thank you very much.