I don't think this will be much help re: your budget, but I scan eBay occasionally looking for a particular hard-to-find Italian fork for my own project. I have plenty of time since the bike has a functional fork (but it's not exactly correct) and I see a lot of forks for sale, many from Italian or EU sellers who seem to be professional strip-n-flippers. I do believe I have seen a few examples that have this sort of fork crown that you seek, but never paid them too much attention since that crown is not the one I am seeking. Short version: I think there may some out there on eBay; chances are you'll wade thru a LOT of ads before you find exactly the right size (let alone brand or color) and the trend I notice is with these sellers the prices are HIGH!