My favorite shoes are about to bite the dust - Help!

I’ve had them for about 4 years. They’re finally giving up the ghost, and I can’t find them anywhere! Walmart doesn’t sell them (they told me specifically). Here is a picture of them. I hope the link works. What I like about them:
The convenience of being able to slip them on and off – this is important for my job, because I have to switch between snow boots and tennis shoes several times in a day.
The low back (In the last 6 months, I’ve wrecked two regular pairs of tennis shoes with their higher backs because, no matter how well they fit, I can’t slip them on and off easily.)
And, of course: Comfortability and quality!

I think maybe Danskin has quit manufacturing this shoe, so what I’m hoping for from my fellow jellies is this: Maybe someone has raving reviews of a pair of shoes that fits the bill. Links to where I could buy them would be especially nice. :)