Not that mine is broken or stretched, but does anyone know the belt size, so I can get the correct replacement?

I'm waiting for a new pre-amp for it at the moment from Maplin's, to enable it to be connected to my Cambridge Azure. But I'm expecting good results.

Are there many out there, these days?

It still works like a dream, after what must be 10-15 years sitting in box, packed away.

I just need to move it further away from the amp to reduce hum (I've tested this, and proximity is the cause).

Your easiest bet would be to take the current belt off and measure it now, before it stretches.

Can't help with the query but took me down memory lane - my first "proper" turntable was an Ariston Icon