It seems to me that at one time, there were some sample chips listed and assigned TCR numbers. I can't find any in TCR13. Have they all been removed, or are the all grouped together somewhere?

I know there an awful lot of different ones, with new makers entering the business every year. However, it would be useful to those of us who collect them to have a cataloging system. Is that in TCR plans for the future, or is the category considered separate and deserving of a separate system like slot cards, match books, and trinkets?