If partial match in file names, generate hyperlink

Hey Wizards,

On Excel spreadsheet:
A3 has a path to folder, like C:\Users\Auser\Documents\FolderA\
Cells A6 & down have a list of values, like 00K12345 per cell

Folder from path in A3 has files named as such: 12 20191002 ABC123 00K12345.PDF

Need: in corresponding cells in B6 & down:
If value from A is found in one of the files in A3 folder
Then generate hyperlink to it with value from A as friendly name
Otherwise populate "Not found"

So far only have the below code which returns true/false if link is valid, but obviously that doesn't get it done

Function HLinkTrueFalse(path As String) As Boolean
    If Dir(path) <> vbNullString Then HLinkTrueFalse = True
End Function

Done both, but:
Formula returns "Not Found" even though manual search confirms file is there
I want to reiterate that search criteria in A6 & down is only partial of file names in A3 folder