[AccessD] Meld 3 Text Files - Urgent

Hi Guys,
 
I have a small project that exports text files (3 of them) in a fixed
width format. Now the company requires that these 3 files be melded into
1 text file only as apparently their import procedure knows when to
import the one file into separate tables at their end.
 
I have no problem creating the 3 separate text files, but how do you go
about melding these 3 separate files into 1?
 
Any ideas most welcome...
 
Regards
Vlad