Combining existing PDF to macro created pdf

[CFo68]

Hi there,

I have created a macro to pdf certain tabs from a workbook. Easy enough but and I am looking to add an already existing pdf to the macro pdf once it is created. I currently have this code which is simply the code to create the pdf.

Sub PDFReport()'
' PDFReport Macro
'


'
    Sheets("Page 1.1").Select
    Sheets(Array("Page 1.1", "Page 2.2", "Page 3.3", "Page 4.1", "Page 5.1", "Page 6.1", _
        "Page 7.1", "Page 8.1", "Page 9.1", "Page 10.1")).Select
    Sheets("Page 1.1").Activate
    ActiveSheet.ExportAsFixedFormat Type:=xlTypePDF, Filename:= _
                ThisWorkbook.Path & "\" & Left(ThisWorkbook.Name, InStr(ThisWorkbook.Name, ".") - 1), _
        Quality:=xlQualityStandard, IncludeDocProperties:=True, IgnorePrintAreas _
        :=False, OpenAfterPublish:=True
End Sub

Can anybody provide some assistance so that I can add in a pdf that already exists in to the macro pdf? It would need to be entered as the first page and go before any of the pages in the macro pdf.