Available on ebay or on MWC site.

Sellers:
http://www.ebay.co.uk/itm/Vintage-St...item45f99ab9f5

http://www.ebay.co.uk/itm/W10-1960s-...item588ac1c002

But I got one for 70 dollars here:
http://www.ebay.co.uk/itm/New-W10-St...item2565e50d3d