For this very reason I convert everything old I own to Blade Fuses.
they are so much easier to get hold of.
Years ago I broke down on an old motorbike at the motorway services and used my spare fuse finding the fault. The garage only had Blade fuses so I had to bodge one in the fusebox with a couple of screwdriver bits from my small toolkit.
That convinced me to change everything over.
RIBBED For extra pleasure.
Member of the ebay Blue RIB cover club.
Member of the Bombard 380 Aerotec club