Есть какой-то zipsplit, не разу не пользовался
Код:
Copyright (C) 1990-1999 Info-ZIP
Type 'zipsplit "-L"' for software license.
ZipSplit 2.3 (November 29th 1999)
Usage: zipsplit [-tips] [-n size] [-r room] [-b path] zipfile
-t report how many files it will take, but don't make them
-i make index (zipsplit.idx) and count its size against first zip file
-n make zip files no larger than "size" (default = 36000)
-r leave room for "room" bytes on the first disk (default = 0)
-b use "path" for the output zip files
-p pause between output zip files
-s do a sequential split even if it takes more zip files
-h show this help -v show version info -L