I believe there are some blueprints/plans available at Track, etc. but most who build from blanks develop their own plans. We study originals and pore over books like Rifles in Colonial America, develop a sense of the architecture and decorative features we want to use, then make our own plans. Eric Von Aschwege is going to give a class on this at Dixon's at the end of the month. Most longrifle building books tell how to lay out a rifle.
Maybe it would help to have some clarification of how you're using some of your terms, just to make sure we're on the same page. "Isaac Haines style" , "transitional" and "top profile" could mean different things depending on context. Most "Isaac Haines" kits are 1780's Lancaster style but with a shorter barrel for easy handling. Obviously Isaac worked over a fair span of time and the architecture of his rifles varied some, being more robust and rounded early on and more "cut and lean" a little later. But all had classic, well-developed Lancaster styling, a straight comb and toe line to the buttstock being a hallmark.
"Transitional" to many means a robust longrifle with Germanic roots still evident, and for me the term evokes a 2" wide buttplate, a D weight barrel, and a guard with a rail well off the wrist. Maybe a sliding wooden patchbox or a simple 2-piece brass box.
"Top profile"; not sure if you mean the cross-section of the stock through the comb or if you mean the view from above that shows the width of the stock along it's length.
Not sure if I've answered anything, but the specifics of laying out a gun on a blank are more than can be written quickly. Basically, lay the barrel on the wood, position the lock, then the sear and trigger, then the buttplate depending on your length of pull, adjust the drop at the heel and the pitch, then establish the lines of the buttstock comb, toe and wrist. The forestock will be determined by the barrel, the web, and the thickness of the ramrod hole. Within these parameters, small changes make it possible to generate a Lancaster, York, Reading, Bucks County, etc rifle design that is instantly recognizable. The small details are the "signatures".