Is there a solid fuse-like item that I can use in place of a fuse, to bypass it?

P = IV. At 240 Volts (V), It would draw the same power (P -wattage) but 1/2 the current (I - amperage) than @ 120 Volts.  Basic electric theory. Hardwiring would do away w/ 2 additional "plug type" connections that can at times be iffy & limit current flow. Wires twisted properly together & wire nutted (in the wall box) & soldered in the amp would be at least theoretically a better way to go. I'm surprised the idea is not tried & discussed in our circle of audio nuts.   

Folks could start by getting rid of a connector at one end by hardwiring power cords to their component, like in the old days.  No rules broken.   I did that with an amp that Steve McCormack rebuilt for me (not my current monos).  However, power cord sales might suffer.

Any power connection needs one fuse and one circuit breaker ( double fail protection) Start by getting rid of additional fuses (e.g. UK power plugs) or additional fuses on circuit boards. Don’t get rid of fuses altogether lest you like sparks and fireworks