Heljestrand made some beautiful ones, not sure whether they did double edged as well.
Just an example here: http://cgi.ebay.ca/C-V-Heljestrand-S...QQcmdZViewItem
Looks pretty heavy to me. If you look well at the contents of the box it seems that the handle constists of 2 parts that have to be screwed one onto the other. That'll create a nice long handle and a heavy razor! And: it'll give you sth. to hone! :D