Who'd you offer it to? I contacted Griffin a year ago and was trying to find someone with a radiator to send them. I even offered to pay full or 1/2 shipping... but no one volunteered. Then the gb interest thread popped up and I was hoping that would go through. I was even about to spend $100 on a junk yard radiator to send them... but by that time summer was over and I lost motivation.
Griffin said they could sell a single unit for $500-$550, or a gb of 4 people would be around $400, 8 people would be around $300. Since they don't have a radiator, those were guestimates. Those have about the same sized core as the SVTs, but much larger tanks. They could also produce a "race" radiator, but you'd have to use hood pins and remove the condenser to fit the 3" core.