Tonight I had another one of those deja vu moments where I realize (after too long stumbling around) that I've been down this particular road before. I'm leaving this note here for myself to remind me in the future how to do this trick.
After getting it to work I decided that I wanted the full sized image for the course page. A bit more googling, and I was able to find a better RSS feed which I plopped into the Feed2JS code generator.
Now I'm a bit scared to search through my blog archives because I'm wondering if this is something I tried leaving myself a note about in the past.