Paul Dustin's Custom brass had Remington make him a special run of those bullets last year, had to order either 25,000 or 50,000 but I can't remember. Paul sold them by the 1,000 and they sold out in a few weeks. Maybe you can find them by asking around, I don't think that Paul even had any leads on more.
You are correct, they are great bullets for the 357 max, herrett and 35 rem. I also have had great success out of my 357 mag bullberry contender carbine barrel. Some folks will tell you these bullets are too short and inaccurate, but that is not my experience at all. As for the factory loads, I consistently shot sub 1 inch 3 shot groups out of my 14 inch bull contender barrel with several boxes of that I got a deal on several years ago.
good luck, if you find a line on more, let me know, my 1000 are already getting short.
regards,
graycg