If you've got an R you could go the Showa route. Or there's this (no idea what the cost is). http://www.maxtonsuspension.co.uk/files/tl1000r.htm
Or there's this:
http://www.bikehps.com/acatalog/wp_shock_absorbers.html
Or there's this:
http://www.bits4motorbikes.co.uk/Hagon/Hagon-Monoshock.html?ID=970
And last but not least, since its what you actually want....
http://www.traxxion.com/bituboshocks-suzukitl1000rtl1000s.aspx
One of 'em's gotta work.
Or there's this:
http://www.bikehps.com/acatalog/wp_shock_absorbers.html
Or there's this:
http://www.bits4motorbikes.co.uk/Hagon/Hagon-Monoshock.html?ID=970
And last but not least, since its what you actually want....
http://www.traxxion.com/bituboshocks-suzukitl1000rtl1000s.aspx
One of 'em's gotta work.