Oncefiredbrass.com has once fired Nosler 280 AI brass in stock for $70/100. This is about the only place that regularly has it. With the limited availability of regular 280 Rem. brass, this is a good option. I just ordered 100 and the quality is excellent. I previously fireformed all mine from Rem. brass.
Have heard this is Norma manufactured. And the headstamp is correct, which isn't usually an issue, but it's a bonus.