Looks like we have a winner. There is a Gotoh with those saddles in a tray design (a 404BO-4) but it doesn't have the top plate, with grub screws, it's a quick release.
Go to the basses for sale section, type in the bass you’re looking for in the search box (top right), select ‘this forum’ from the drop down in the search box, enter.
A couple of new ones for next month’s gig, The Night by Frankie Valli & Co and Start by The Jam, neither of which were chosen by me. The band knows how to keep the bass player happy.