University of Texas has one that looked pretty ok, but it was kind of expensive for a non-Texas resident.
University of Western Florida has one for “Mathematical Sciences”, which more or less fits, and it’s not even that expensive, but I think that one is synchronous.
That said, if you feel like you're organized enough to pull it off, I do recommend looking into University of York. It's a very good school.
Why did you complete WGU masters in computer science after already having a PhD in computer science?
I wanted a graduate degree in CS, and I figured I could get the WGU one quickly.
Feel free to email me (address in profile) if you want to talk about it.