Hello Francis,
I recommend that you try to get in touch with LHF member
ayaboh by sending him a pm ( private message ) through this forum .
Additionally, read all of his posts for a sort of backgrounding about him and his capabilities .
A few years back, he created a ( 38 mb ) pdf file for the construction of the 4344 cabinet / ( with a slightly altered layout of the woofer ) . His CAD work was exemplary .
He once had a website that allowed the download of this huge file / but it seems to be no longer active .
Try to contact him to see if he will send you the file(s) . ( The file might need to be broken up into smaller parts for efficient transmission ) .
>< cheers