30+ years ago, back in the early 1980s, I took an original to an old time saddle maker, a guy who had been in the custom leather business a long time.  The old timer took a long while explaining to me how the whole box had been constructed and hand sewn, said that he did not have the skill to make an exact copy and that he doubted that anyone still alive had both the skills and the tools necessary.  If this is a reasonable functioning copy, rejoice and order a couple.