I couldn't find any. I would stay away from buying once fired brass. I bought some from a reputable gun smith who loads roads for his customs and they were loaded so hot on once fired brass they had 9 thou web expansion and primers fell out. I bought 26 nosler Norma brass and a Redding expander ball and neck up. You can get 100 of them for about $200. Be careful on neck tension as brass has memory and after I annealed I had to run a quick pass over the expander ball again to have consistent neck tension. Another thing to keep in mind is neck thickness will be different if your using a bushing die.
I would like to neck down some bertram 338 brass and see how it holds up.
If you have expanded the primer pockets try federal primers, they do have a slightly larger cup than a cci or winchester primer.
I would love to see another manufacture pick up 26 or 28 nosler. It's really easy to neck up or down. I called lapua and they mentioned they haven't seen the demand yet. The nosler/Norma brass is just a little to soft. I do use federal 215 primer s