This is a very interesting question .
I forget, who is the vendor that supplies the front brake hardware for Triumph? Possibly other motorcycle makes use the same vendor but have differently shaped levers that might swap out. I wonder if Harley stuff might work with some machine work?
On the hand it may be the Chrome that is of greater interest. What would be the costs of chroming stock levers and pivot boss?? That would look great and eliminate the corrosion pitting.