:-D
Good question. They're scarcer than hen's teeth most of the time then sometimes there'll be 2 or 3 will show up at one time on the Auction sites or on GunsAmerica.
I know a couple people who own one, Mr. Graybeard himself for one and they won't part for love 'ner money. I myself have a B78 in .243 which I purchased over a year ago NIB which I haven't had the heart to shoot yet but it's going to happen this spring. I kept thinking I might resell it but I've decided they're so rare I'd just keep it for my selfish self.
I will keep an eye out and will forward to you anything I discover.