Audio Refinement was indeed offered by YBA. The Complete integrated is very refined integrated though not in production for some 15 years (longer?). Originally sold for ~$1000. A high value piece for the money at that time. I had one in my system for about a month about nine years ago. Was considering a purchase however I felt that the asking price was too high for it's age. If I am not mistaken, I believe your budget, based on another thread, is in the $300-$400 range. Given the age, IMO a reasonable price for a Complete integrated in good condition that has not been serviced would be ~$300. I would want to hear the unit in question.
Good luck in your search.
Good luck in your search.