If you need spares, talk to Ketan at Arc EuroTrade. He is a most helpful chap!
I'm guessing that your lathe is actually a Seig C2, with a 300 Watt motor,and although ARC don't sell them, they do sell spares. Including fuses, and a "rubber" dirt excluder to fit around the Leadscrew where it passes into the Control Box. You may even be able to get hold of a user manual for it.
The one thing that, I gather will destroy the circuit board, is to start up with the speed control set above minimum.
I think it was Ketan who posted on another thread about the C2, a list of ways of messing up the electronics.
DO find the other thread and read through it; it includes a hand drawn circuit diagram, and LOTS of info and advice.
The manual for my C3 (which has a different, and non interchangeable, 350W motor and control board) definitely says
"CAUTION: Always turn the speed control to the minimum speed position before starting the lathe. Starting the lathe with the speed control control set to a higher speed can damage the speed control circuit board"
It also advises a maximum cut of 0.010 inch (0,25mm) when roughing. Remember it is only a small lathe with a 300 W motor, so big cuts are a No No. Also, heavy loads at low speed can cause the motor to overheat, also at low sped you have a lot less torque available.
There are a lot C2s and C3s around, and people have done a lot of good work on them, and made a number of accessories and mods to improve their versatility. (Heeding a warning from Mike Cox, about swarf finding its way through the mandrel and falling inside amongst the plastic change gears, I have just made a simple extension for the mandrel to ensure that any swarf falls out of the back, rather than inside).
Hope that this is some help.
Howard