Parts source?

Hello all,
Does anyone know of a good source (on-line) of components? I am in Canada, in a small community, and am having a hard time finding any parts to help me with repair, etc. For example, I am now in search of a mini 2 amp slow blow fuse for my AE-25 Super Amp, and have not been able to find one anywhere, including on-line. Help, please.