Huge fan of vintages especially the 139, but I don't have any. Indeed a hard job to find vintages in very good original condition. A lot of luck is needed here. My humble approach is to get good modern interpretation (homage) of the historical pieces.
On the other hand, Montblanc just used a standard 149 nib for the Hemingway. I kind of believe that Montblanc didn't really want to invest too much in modifying tools and take extra miles to make their very first two limited editions. Maybe they would like to see how the market would react and thus