If anyone else besides me waited too long to pick this book up before it went out of print, I found a source for copies at a reasonable price. Everyone on Ebay and Amazon seemed to be asking $100+, but I found a source in Biblio.com who still has 25+ copies left for $50/ea.
https://www.biblio.com/book/definiti...2/d/1374418981
Edit: July -looks like the seller noticed our little buying spree and adjusted the price of the remaining books up +$295
