Is it possible to order or purchase a hardcopy of an NTSB report?
I'm not sure that this is on topic, but the short answer seems to be that you need to contact the National Technical Information Service. NTSB reports used to include this text:

Accident reports, safety studies, special investigation reports,
statistical reviews, and safety recommendations may be downloaded from
the NTSB Web site, or printed copies may be purchased from:
National Technical Information Service
5285 Port Royal Road   Springfield, Virginia 22161
(703) 487-4630 (Subscription Orders)   (703) 487-4650 (Single-Copy
Orders)
(Subscription rates apply to certain recurring publications)

The current wording is:

Copies of NTSB publications may be downloaded at no cost from the
National Technical Information Service, at the National Technical
Reports Library search page, using product number PB2020-101001. For
additional assistance, contact—
National Technical Information Service
5301 Shawnee Rd.
Alexandria, VA 22312
(800) 553-6847 or (703) 605-6000

Alternatively, since NTSB reports are in the public domain (with some limited caveats) you could just get them printed at your local print store, presumably much more quickly and cheaply than by going to NTIS.