The Best Sixty was offered about fifteen years ago by one of the G-scale suppliers, I don't remember which one. The production was a limited run with several details offered and it was made in Germany. The LGB flat car, cleats and loading ramp were offered as one of the options. I found this on eBay about three years ago. Several of the parts were broken and one of the tracks had some issues, so I bought it and repaired it. Additional details were added to the set then it was painted and weathered. You might consider eBay if you are looking for one.
Chris, I am one man with two hands and more projects than good sense... leave me alone already! (KIDDING!)