You could use a script task for this. Go ahead and run your existing SSIS package to the the bad file (without blank lines), then create a new script task and use something similar to below.

Dim origFile as StreamReader = New StreamReader(add_your_orig_filename_here)

Dim newFile as StreamWriter = new StreamWriter(add_your_new_filename_here)

' Store the last order number

Dim lastOrderNumber as string

Dim thisLine as string = origFile.ReadLine()

lastOrdernumber = thisLine.Substring(0, thisLine.IndexOf(","))

' Read through the file and write the output back out to the new file

' inserting newlines as appropriate

While Not origFile.EndOfStream

dim thisNewLine as string = origFile.ReadLine()

' Is this the same order? If not, add a blank line between

If lastOrderNumber <> thisNewLine.Substring(0, thisNewLine.IndexOf(",")) Then

newFile.WriteLine()

lastOrderNumber = thisNewLine.Substring(0, thisNewLine.IndexOf(","))

End If

newFile.WriteLine(thisNewLine)

End While

' Flush the file buffer

newFile.Flush()

newFile.Close()

hth,

Tim