They fit most KTM EXC from 2000 onwards,and 690 of course.For other bikes,the measurements of the M8 holes in the Bar op Clamps are 90mm x 38mm.
Or if you just wanted to fit the Top Plate,then we use 4 M6 tapped holes in the Top Bar Clamp,which are 60mm x 38mm,which you might be able to machine into your existing Bar Top Clamp,if possible.
It was good to meet up with some of the members at the Rally Dalmatia in Croatia,we really enjoyed it,hope to be back next year