Regarding the Rox Risers...
They have three models of the "fixed" (no-pivoting) variety. The rather standard one...
http://roxspeedfx.com/product/rox-pro-offset-block-riser.htm
Then they have their "Elite" model...
http://roxspeedfx.com/product/rox-pro-offset-elite-block-riser.htm
Which, as you note, have the mounting holes that go to the triple clamps slightly elongated so they can fit many different bikes. They also have circular inserts that allow them to be used with standard 7/8ths inch handlebars should you want to try some. With the inserts removed they mount "Fat Bar" types, like what comes on the Super Tenere standard. These "Elite" risers are the ones I have.
Then they have the black "Elite" risers you mention...
http://roxspeedfx.com/product/rox-pro-offset-elite-block-riser-black.htm
These are identical to the silver "Elite" models other than being anodized black. You may want them, but IMHO black ones would look rather odd on the Super Tenere's silver triple clamp and with its silver handlebars.
Just FYI...
Dallara
~