It should be easy enough to make something similar.
Here is the Tekno pdf on their linkage with pics.
http://www.teknorc.com/tekno5/wp-content/uploads/2012/05/TKR1011-instructions.pdf
Here is what the kit came with, assembled pic can be found in the above pdf.
Here is the old New Era offset for the arm, should be easy enough to make out some aluminum flat stock.
It bolts on top of the engine mount tab, and you can make it offset as much or as little as needed to suite your particular truck/engine combo.
Here is a thread with some pics of a throttle arm mount made like the one above, and using the stock revo throttle arm.
http://www.rcuniverse.com/forum/tra...uns-28-roto-start-there-revo.html#post5998390
https://www.rcnitrotalk.com/forum/threads/show-us-pics-of-your-revo-big-block.102087/