If he were my friend, I would consider what he doesn't have, and cross-reference that against what he's mentioned he thinks he might like, before I went any further.
For all you really know, he may be tickled pink with an unusual pistol, knife or somesuch other sort of gear.
I have several "well off" friends, and was at a loss for Christmas gifts - so handmade them each their own hunting knife & sheath.
The knives weren't "perfect", but all took them to heart, in the manner the gift(s) were intended.
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