For sale here is a NOS Vintage Ducon Power switch. This is a push pull switch rated for 2A, 250V, so it should be good for at least 4A or 6A at 125V and will be fine for most tube amplifiers. This is guaranteed to work great for you. This is a pretty rare item and would be great in your guitar or bass valve/tube Amplifier. You can always cut down the shaft if you want. Check out the pictures. The insides are interchangeable with other Ducon potentiometers of the era.