Here ->
http://www.adventure-spec.com/defaul...0z-tenere.html
if scaffolding is your thing.
or,,,
http://www.off-the-road.de/XT-660-Z-...-Z-Tenere.html
if you want something neat and tidy
OTR have been know for some erroneous delivery schedules, but I have always found them to be true to their word. I think the trick is to speak to them, don't rely on the web ordering.
In any case, the OTR engine guard was tested to destruction by JMo on the Heroes Legend Rally, and I've had one fitted for the best part of 20,000 miles through all kinds of terrain. My bike has had it's fair share of horizontal moments, no damage to any of the engine parts.