I have been doing ciba prints since 1982. I can only do up to 16x20 and have been having all sorts of trouble finding the chemicals for my ICP-42. Unfortunately I spent most of the 80's and part of the 90's working in photo labs looking at other peoples pictures that I am hard pressed to print anything other than my own work.
I will say that I had the most pleasant experience with The Lab-Ciba. I had some work done last October, and Frank Green certainly made it all possible and did a fantastic job. It is sad to note that this craft is falling by the way-side, but as the medium changes, so does the availablity of taditional technologies. Do please drop Frank a note. I also know that John Weldon at Weldon Color Lab, does a fantastic job as well.