Back when I was deciding about Excelsior I found some part of their site that listed schools
that accepted their classes for credit. I know there were lots and lots.
Originally, I had planned to take some pre-requisite classes through Michigan's Virtual University. It's a consortium of several Michigan colleges pooling their online courses. Quite a few accepted Excelsior credits (and vice versa).
I'm not sure which state you are in, but look for online programs along that line at colleges in your State. (I'd check there first because it seems easier to get scholarships
or funding from schools in your own state). But then search schools nationwide.
There's so much changing all the time with online classes. You might even want to do a search along the lines of the course title, distance learning, etc. I would just avoid places that seem to be in the business of selling materials (like Rue) and make sure the school is accredited.
Another idea, Thomas Edison College (or a name something like that) has a huge directory of online courses linked to their site.