Is this what you're referring to?
This quote from one of Pastor Tim Warner’s articles, “The Kingdom Hope in Hebrews” (Warner is Historic Premill), might help in seeing where I am coming from:
“There is much debate today, particularly amongst Dispensationalists, as to whether the New Covenant has actually come. Yet, Paul (Warner believes Paul wrote Hebrews) left no doubt that the New Covenant had come... This is also confirmed in several other passages (cf.Luke 22:20, 1 Cor. 11:25, 2 Cor. 3:6, Heb. 9:15).”
Taken from Warner’s website: Answers in Revelation (.org)