Mounting Garelli mudguard on Lambretta forks

I have converted Lambretta forks on my Vespa P200 but don’t want the big standard Lamby mudguard. I wanted something sleek like the carbon Garelli Race and was wondering how difficult it would be to remove the bracket it comes with and mount it to the Lambretta forks.

If anybody has experience with this I would greatly appreciate any feedback.