I received an email today from the place Bruce and I ordered our blade-style fuse boxes from. They are clearing out all of their supply of British fuse boxes at $30 each.
I have ordered myself a couple of spares for Minis/Triumphs.
Be careful as the one for Minis is different from the one for Midgets. The Midget one has a bridge between two fuses that the Mini/Triumph one does not. Ask Bruce what happens when you have the wrong one.
Torque Resto Parts (https://www.torquerestoparts.com/)