Voltage regulator up to 100v?
If you don't need regulation at all, what you probably want is a transformer with about a 63VAC output. Full wave bridge module (easily available up to 35A or more) and a filter cap (value depends on ripple you can live with, but usually 100V or better) and you're done.  

As an added advantage, the galvanic isolation provided by the transformer reduces the chances you will injure yourself. In any case, have a qualified electrician have a look at it before you power it up. Reversing the capacitor, for example, could lead to a bang with shrapnel and liberated electrolyte chemicals in the air.