I came across the Novation Apple-Cat II firmware ROM in my junk drawer. I did a quick search and didn't find it anywhere, so I put it on my site: http://www.seanriddle.com/novation_490408_ces_r.2.1.2a_c1982.bin

It's a 2532 but the 2nd half is all 0s. I thought there might be a problem with it, but the manual I found online calls it the "firmware 2K ROM option".