I cleaned out my closet and found my wounded rear wiper assembly if anyone wants it for free. Thought I'd post it hear in the hope that anyone searching for "rear wiper" might find this. Maybe there's a better way to post this... Anyway, let me know via private message and I can send it to you when I have a moment.
Details:
An assailant damaged not only the wiper blade and arm, but also the last part of the assembly that the wiper arm bolts on to (the bit that extends up past the glass when it's installed). The motor should still work fine, along with most everything else except that the tip of the shaft has been sheared off. (As an anti-circumcision children's/men's advocate, I'm not too wild about writing those words, btw. No, I'm not kidding, my website should be in my sig.)
Mad props to forum user burchett who had previously deleted his rear wiper, and sent me his complete wiper assembly in perfect working order.
-kat