You seem to be seeking 'working drawings' which I doubt you will find. There are books showing exploded-view drawings and dis-re-assembly info but none I have seen with dimensions. Probably the only dimensioned drawings that ever existed were with the original manufacturer, if any. Even then, they may not have worked from drawings.

If you have to make a part why not do it the old fashioned way like the rest of us do? We estimate, guestimate, cut and try.