Currently DFSORT does not have any feature to append a character at the end of variable data. You want to append X'0D0A' which is CRLF which is only required by the windows OS. Unix just needs LF. If you are FTP'ing the data then as bill mentioned , then FTP/NDM software can insert the x'0D0A'. If you want to get it done via DFSORT then you can code a bunch of IFTHEN statements and validate the length in RDW and overlay the contents. But coding 1496 IFTHEN statements is tedious job. So I generated them. Use the following DFSORT JCL which will give you the desired results.
//STEP0100 EXEC PGM=SORT
//SYSOUT DD SYSOUT=*
//SORTIN DD *
Dummy record
//SORTOUT DD DSN=&&C,DISP=(,PASS),SPACE=(CYL,(1,1),RLSE)
//SYSIN DD *
SORT FIELDS=COPY
OUTFIL REPEAT=1497,IFOUTLEN=80,IFTHEN=(WHEN=INIT,
BUILD=(3:C'INREC IFTHEN=(WHEN=(1,2,BI,EQ,',SEQNUM,4,ZD,START=5,
C'),OVERLAY=(',SEQNUM,4,ZD,START=6,
C':X''',C'0D0A''',C')),',81:SEQNUM,4,ZD)),
IFTHEN=(WHEN=(81,4,ZD,GT,1),OVERLAY=(1:8X),HIT=NEXT),
IFTHEN=(WHEN=(81,4,ZD,EQ,1495),OVERLAY=(48:C'1499')),
IFTHEN=(WHEN=(81,4,ZD,EQ,1496),OVERLAY=(48:C'1499',62:X)),
IFTHEN=(WHEN=(81,4,ZD,EQ,1497),BUILD=(3:C'OPTION COPY'))
//*
//STEP0200 EXEC PGM=SORT
//SYSOUT DD SYSOUT=*
//SORTIN DD DSN=Your Input VB 1500 byte file,DISP=SHR
//SORTOUT DD SYSOUT=*
//SYSIN DD DSN=&&C,DISP=SHR
//*