Orion 8" glass solar filter with instructions, good condition $135 posted. The widest inside diameter seems to be around 225mm with the screws almost all the way out, maybe a little more.
I used this occasionally on my C8i SCT. It will allow you to view sunspots, transits, eclipses etc safely without damaging your eyes. You can also use it for imaging and solar photography.
Pickup also available from the Mandurah area WA, knock off $18 for pickup.