Some years ago we made about 50 fuseboards in grp, printed both sides, fitted with modern spade fuses.
Unfortunately it took a long time to sell them and at the time I was surprised there wasn't more demand as the price was about the same as original ones.
Electronics have moved along so much that I suspect there may be an easier alternative now.
I don't think we could make a better approach today, Will.
It surprises me too that it took a long time to sell those 50 boards as I would consider that a very feasible upgrade. Also an easy one, as it would not require any changes to wiring - and any owner could install the board himself. This is unlike an option that I've been somewhat in love with: A complete new fuse/relay housing made with a modular system like this one:
With this system I could eliminate the edge connectors completely, make better contact to the battery (with an 8mm stud), incorporate a relay and wiring for driving lights, make better fusing, install a high current relay to offload the ignition switch of most loads etc...
Size of this configuration is only about 160 mm x 100 mm.
It's a bit pricey however, with all the bits and pieces it is around 150 GBP AFAIR, plus a metal piece cut to fit the module in the original fuse box. But I still fancy the idea.