you can get some trip switches to fit into the old ceramic fuse holders.
also just note with the panel in the fuse box if it is dark in colour to almost brown or black - guaranteed to have an asbestos component in it. Fibro in your eaves and bathroom panels (pre 90's) has about 12% asbestos, panel that the fuses and meters attach to in the meter box has about 55% asbestos - dangerous stuff so be very careful and a note to anyone with a house pre 1990 almost guaranteed to have an asbestos panel and the dust in the bottom of the meter box box will be the drill dust from new meters installed over the years. Get a wet rag and wipe out and just use new rags to continue and bag it straight away - don't rinse it, and never blow out. I only know this because I setup an asbestos register and audit of the last company (many buildings and factories on a 32000m2 site) I worked for and did training to identify and remove - not that I did any removing.
