Not 100% sure what you need, but maybe this:
SELECT p.*
FROM @PRODUCT p
WHERE NOT EXISTS(
SELECT 1
FROM @DRIVER d
WHERE p.[Base Line] LIKE d.[Base Line] AND
p.[REP LINE] LIKE d.[REP LINE]
)
Not 100% sure what you need, but maybe this:
SELECT p.*
FROM @PRODUCT p
WHERE NOT EXISTS(
SELECT 1
FROM @DRIVER d
WHERE p.[Base Line] LIKE d.[Base Line] AND
p.[REP LINE] LIKE d.[REP LINE]
)