Macro - Open up file based on search filter located in folder with various subfolders

Hi,

Can anyone please help me with a coding that allows me to search and open up a file that can be located in a folder and all its sub folders?

my coding so far only allows me to search and opens up the file name in a specific folder "Quotes - WA" and does not search sub folders.

 Sub Openup_WA()


Dim myFile As String
    Dim myPath As String
    Dim myFilter As String
    Dim Quotenum As String
    Dim eScriptObject As Object
    Dim xresult As String
    ' pick up search string from
startagain:
    Quotenum = InputBox(prompt:="Enter Quote Number and Company Name", _
                        Title:="Open Quote")

    If Trim(Quotenum) = "" Then
        xresult = MsgBox("Do you want to try again", vbYesNo, "No Value Entered")
        Debug.Print xresult
        Select Case xresult

        Case vbYes
            GoTo startagain
        Case vbNo
            Exit Sub
        End Select
       End If
       
       myFilter = Quotenum
              
Set eScriptObject = CreateObject("Scripting.FileSystemObject")
        If eScriptObject.FileExists("\\NAS\Shared\Quotes - Customers\Quotes - WA\" & myFilter & ".xls") Then
            MsgBox "Opening Quote File", vbInformation, "File Found"
            Workbooks.Open ("\\NAS\Shared\Quotes - Customers\Quotes - WA\" & myFilter & ".xls")
        Else
            xresult = MsgBox("Do you want to try again", vbYesNo, "Quote Not Found")

            Select Case xresult

            Case vbYes
                GoTo startagain
            Case vbNo
                Exit Sub
             End Select
            
            End If

End Sub

The main coding i need help with is

    If eScriptObject.FileExists("\\NAS\Shared\Quotes - Customers\Quotes - WA\" & myFilter & ".xls") Then
            MsgBox "Opening Quote File", vbInformation, "File Found"
            Workbooks.Open ("\\NAS\Shared\Quotes - Customers\Quotes - WA\" & myFilter & ".xls")
        Else

I need it to allow me to search in the 'Quotes - Customers' folder parameter but also searches in subfolders eg. 'Quotes - WA' / 'Quotes - VIC' or 'Quotes - NSW'

Can anyone help? Hopefully i have explained it properly.