The 24-cup Black & Decker rice cooker I bought is very hard to find these days. However, I have been eying a 38-cup Black & Decker rice cooker at Amazon.com. There is a review form someone who is using it in their sous vide setup and they say it works great. It's only slightly more expensive than the 24-cup one was.
38-cup rice cooker link on Amazon.com (Price right now: $55)