Antwoord:
As far as I know, there are no current veldt models that are narrow per se. Sizing down half a size might be the answer, or he could keep his eyes open for vintage Lotus shoes and boots as they were made in different width fittings (CX and DX are the narrower designations for the post-WW2 Lotus models, if that helps).
If he's specifically after a new model then the only option would be a Sargent MTO (The Shoe Healer could help with this), or a C&J or EG MTO. I think EG could make one on a D64 last or possibly a D58 last as the 58 last is used for the Dundee veldt shoe.
Does he have any particular preference for shoe or boot, and maker?
Cheers,