The fuse is unlikely to be found at Jaycar (at least that is what I found last time I checked with them).

Here are a few links for where you can find them.

GPE - http://www.greatplainselectronics.com/search.asp?nobox=&scat=&stext=fuse&stype=&sprice=&pg=2.  Ed is a really good guy at GPE, and postage is most reasonable.  If you buy from overseas, may as well add other misc./spare electrical components at the same time.

Big Daddy - http://www.bigdaddy-enterprises.com/