Boy, it'd sure be nice if somebody still made print developing drums. I'm nearly ready to start my first ever color printing session but trays seems the only way to go nowadays. What are the procedures for tray development? In B&W developing you use a safelight, not so with color. In B&W development, your chemicals sit in a tray and you move the print from tray to tray, over and over again. Do you do the same in color? I know with a drum you dispose of the chemicals each time.
They may not be made, but there are hundreds of them out there in garage sales & the like.
Your description is right on the money for tray processing though. Years ago someone also made a rocking tray called a "color canoe". Used in the dark, the print remained in the tray & chemistry was added & dumped like a drum processor.
Did you check KEH,Freestyle & the other likely suspects?