Well I googled "wedding hamper" and the top 3 results were (I appreciate the results may be different if googling in the US):
- Fortnum and Mason which you say isn't what you're looking for
- https://www.hampers.com which has a very wide selection
- https://www.etsy.com/uk/market/wedding_hamper my wife buys lots of stuff on etsy and always seems to be messaging the sellers to customise the products so you should be able to arrange something you like