I made a new patch per your instructions:
diff -r -N -u ${CVS} ${NEW} | gzip -c - > hs2p_patch.gz
and placed it at
http://www.acjlaw.net:8080/~jeremy/Ricoh/hs2p_sane_backend/hs2p_patch.gz
It patches the following 16 files (I hope I haven't forgotten something):
# zgrep "diff -r" hs2p_patch.gz | cut -d ' ' -f5
sane-backends/AUTHORS
sane-backends/backend/Makefile.in
sane-backends/backend/dll.conf.in
sane-backends/backend/hs2p-s.c
sane-backends/backend/hs2p-saneopts.h
sane-backends/backend/hs2p-scsi.c
sane-backends/backend/hs2p-scsi.h
sane-backends/backend/hs2p.c
sane-backends/backend/hs2p.conf.in
sane-backends/backend/hs2p.h
sane-backends/configure.in
sane-backends/doc/Makefile.in
sane-backends/doc/descriptions/hs2p.desc
sane-backends/doc/sane-hs2p.5
sane-backends/doc/sane-hs2p.man
sane-backends/doc/sane.man
