You could try the Nitro Team Pro 162 wide of stock boards, should be fairly easy to find.
Also take a trip to one of those racecrosscamps and talk to people/demo stuff, like Apex/SG/Swoard. Apex has some ExtraFuckingWide sizes at least. Most are directional with like 10 mm taper, but that won’t that much of a disadvantage.
I think 280ish waist width should be no overhang at all for you, and 270 might be enough.
Also take a trip to one of those racecrosscamps and talk to people/demo stuff, like Apex/SG/Swoard. Apex has some ExtraFuckingWide sizes at least. Most are directional with like 10 mm taper, but that won’t that much of a disadvantage.
I think 280ish waist width should be no overhang at all for you, and 270 might be enough.