I'm working on a nice little gain clone. It's going to need 40-0-40 to drive it and mostlikely needing a 400-550VA power capability. I been looking at SMPS and Linear power supplies. If I can with a linear design, where can I find the toroids needed, but at a cheap price (for here in eastern America). I would rather a SMPS just for it's smaller form factor, but does anyone know of a source for them cheap? I'm going to have a supply for each channel, so I'm going to need to of everything. Could anyone point me in the right direction?