Oh oh oh! I know this one! I had the same thing (trusty old ones died) and went upscale for the new ones, and they are SO GOOD!!! I got the women's large, and it fits perfectly...Amazon prime link, per your request: https://www.amazon.com/gp/product/B000PMPTEK/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1
So, the best thing I've found for that is the below. It doesn't stretch the entire top at once, but if there's a part above your toes that is too tight, this will stretch it inch by inch. (It's also great for shoes that pinch your pinky toes on the sides.)
I've also tried these, but they don't really work how you'd want them to. They make the shoe entrance higher, maybe, but won't stretch out a toebox.