Correct. The conversion effort simply took too much attention from new product to keep up for every single Classic Spycraft title.
There are plenty of kit-bashers here on the forums (especially this board!) where people can help you convert whatever you like. The 60's book, coming later in the silver line series, was closer to where we were as designers when we wrote 2.0, and you may find a greater degree of compatiblity than books made earlier in the line. Plus, the 60's is full of all sorts of gear and fluff which can be used almost straightaway with little to no conversion