Individually zip or 7z each file into a separate archive.

indzip.cmd

@ECHO OFF
SETLOCAL
ECHO.

SET TYPE=
SET FILE=%~2
IF /I "%~1" EQU "zip" SET TYPE=zip
IF /I "%~1" EQU "7z" SET TYPE=7z

IF "%TYPE%" EQU "" GOTO :USAGE
IF "%FILE%" EQU "" GOTO :USAGE

:START
ECHO Creating a %TYPE% file for each non-%TYPE% file matching "%FILE%".
PAUSE
ECHO.

FOR %%I IN ("%FILE%") DO (
    echo File: %%I
    IF /I "%%~xI" NEQ ".%TYPE%" (
        IF NOT EXIST "%%~nI.%TYPE%" (
            REM ECHO Creating: %%~nI.%TYPE% . . .
            IF "%TYPE%" EQU "zip" zip.exe -9 "%%~nI.zip" "%%I"
            IF "%TYPE%" EQU "7z" 7z.exe a -mx9 "%%~nI.7z" "%%I"
        ) ELSE (
            ECHO Warning: "%%~nI.%TYPE%" already exists.  Skipping.
        )
    )
)
GOTO :EOF

:USAGE
ECHO USAGE: [zip^|7z] filename_or_wildcard
ECHO EXAMPLE: %~0 zip *.a26
GOTO :EOF