http://www.ebay.com/itm/Adjustable-spanner-wrench-High-Back-Spanner-Steam-stationary-Tractor-tool-/380707716004?pt=UK_Hand_Tools_Equipment&hash=item58a3f2bba4
I'm tempted myself, but I think there are others who would like it even more than I do. Price wouldn't be bad at all if you could get it for the opening bid. Would come to right around $20.