You can find the fuses at auto parts stores, but not most other stores.
It is simple enough to get a fuse block for blade or mini blades, used on cars. You can either wire in 3 separate holders or you can find 1 3 fuse holder. They will have their own wires that you can solder into the wires you pull from the old fuse block.
Separate ones are about $2-3 each or so, they just need to handle 15 amps.
A little more cash and you can actually get small auto circuit breakers instead.
The ride IS the adventure. The destination is just to get gas!