For members of Companies A, B, C, and D ONLY, we have New York cartridge box plates available.  Certainly not required for every member of the four veteran companies, but the Ordnance Returns and surviving ID'd originals show a good handful of these plates remained on cartridge boxes (but not waist belts) in these companies of the 10th New York Battalion in 1864.  These will come with a proper strip of tapered leather for attaching to your box when you pick it up in June.

New York Box Plate - Petersburg