My friend has a sano tube accordian amp and he is needing a new fuse for it. What type of fuse does it need and where can I get it? Does anyone know....

My Gear-
Guitars: Ibanez S570DXQM, First Act VW GarageMaster
Amps: Peavey ValveKing 112, Roland 15XL
Pedals: Big Muff w/ Tone & Wicker, Original Crybaby w/ Modifications, BYOC Overdrive 2, Danelectro Cool Cat Chorus, Boss PH-3,