Crikey, that's a blast from the past. The Chinook & Delta 5-5 were the boats to have in the 80s amongst divers. Can't help with the search, sorry. Good hulls for their day, I don't know how they compare to more modern designs, probably very well, as modern hulls are tending to compromise sea keeping for economy (IMHO)
Good luck with your quest.
Rule#2: Never argue with an idiot. He'll drag you down to his level & then beat you with experience.
Rule#3: Tha' can't educate pork.
Rule#4: See rule#5