The FU bridge is basically a FU branded Gotoh 1996.
The Gotoh drops into a Floyd route, or even the 7 string version drops into and Edge Lo Pro 7 route, but some shaving of the treble side wall will be needed. I did mine with 300 grit sandpaper until a business card slid in between the base plate and the wall freely.
Additionally, the treble side of the base plate at the outside corner of the pickup side of the baseplate will need ever so much trimming so that the front edge of the base plate doesn't come in contact with the route. For orientation reference, this would be as though the guitar were sitting on your lap in playing position, and the areas of treatment would be your top edge, and the top left corner.
Beyond that, studs align and material choices are subjective.