eBay and Craigslist finds

i think will be trick remove the freewheel block without the help of the rim+spokes, you will need something to hold onto while using the spanner+freewheel remover. A vice will mark the hub, even damage it

and the seller said

when the spokes were reomved they were cut out on the side with the freewheel but i unscrewed the side with the fixed wheel on it. You could put the hub in a vice if you clamped it by the sprocket or wrapped the hub in cloth so it will not get damaged. From tom