Some have dome it by drilling out the Berdan primer, leaving it in place as a sleeve, or if the pocket isn't too oversized, decapping and then peening the edges of the primer pocket and the reaming to the correct size. For me, it seems that either option would be too much work for such a a common caliber as 30-06. Maybe just store it in a corner and wait to see if anyone, anywhere, imports any more Berdan primers.
I've got about 100 8mm Mauser I bought years ago that had been converted from Berdan, apparently by an arsenal somewhere. 40's and 50's headstamps, Berdan anvil removed, center hole drilled, pockets sleeved so well that some are hard to see. Was all loaded with FMJ bullets, and kicked like a mule!