There used to be a user's website with a bunch of .ins files.. for about 50 synths .. and then it was gone. Sadly a waste of a HUGE resource, but Cakewalk seems to not care... You are reduced to scouring a dozen forums and multiple search engines to try to find .ins files these days... best i can suggest is to try korgforums
I really have zero idea why Cakewalk cannot put up a hosting page for .INS files.. After all, the benefit goes to Cakewalk and the pain of not having it, well, it is their customers... But as you can tell by this forum, anything about hardware is rapidly
ignored moved to the hardware forum, but VST threads stay in the Sonar page...