Perhaps I am swatting at the hornet's nest on this one, but I am having a hard time understanding why you don't simply purchase the adapter kit directly from Kennedy?
They spent quite a bit of time working with builders to develop a number of adapters for the kit car market. It seems a bit of a shame for someone to send their hard work out for all to copy. As a vendor here, and one who has made some adapter plates of our own, I can tell you that a lot goes into making these and getting them correct.
If you want to try to make one of your own that is one thing, but to simply copy Kennedy's hard work, is quite something else. Vendors here and around the world all work quite hard so that you are able to complete your projects, and speaking for myself, are happy to do so. It is great to be a part of someone's project, however, if this was a GBox product being freely shared for people to copy, I think I would be quite disappointed. It makes it hard to put the work in if it is just going to be copied after the fact by everyone else.
Just saying.
Erik Johnson