The last correspondence I had with the author was in 1995, when I needed confirmation regarding the opening of the Hotel Condado for some 1931 chips I was marketing at the time. Though I don't know how many copies were printed, nor of availability at this time (my copy is #263), the author may be contacted at:

Efrain Archilla-Diez
Apartado 9300
Naguabo, Puerto Rico 00718

Though the book is in Spanish, and mostly covers the coins and tokens used on the island, there is still a lot of descriptions and about 60 or 70 photos of chips. If you have any problem in obtaining a copy, Archie, I will be more than happy to lend you mine.
The last time I talked with Al was about 6-weeks ago. I'll call him this week.

John Benedict