Need a fuse for my subwoofer

[Ender17]

I blew a fuse in my subwoofer, a Def Tech ProSub 1000
it's a 3.2 amp 250 volt slow-blow Littlefuse 313
type
Part Number: 31303.2
couldn't find it at RadioShack or Lowes and only the cheapest I can find is $21 shipped for 5

[SpiderX1016]

http://www.parts-express.com/pe/pshowdetl.cfm?&DID=7&Partnumber=071-702&ctab=1#Tabs