I replaced my fuse with an ATC blade type circuit breaker (10 amp in my case, part number 46610) from Waytekwire.com. Unfortunately, the circuit breaker wouldn't fit in the fuse holder so I used female blade terminals with heatshrink insulation to connect it into the circuit. It has worked perfectly ever since.

The circuit breaker may not be sufficiently weatherproof to survive without some form of enclosure. Mine is housed inside a box under the deck of my Xtracycle which keeps it out of the rain. If you want one to hang outside you may need to dip it in a plastic coating to keep it dry.