every now and again you will get a good answer to technical questions on here, more often than not it will be no answers at all or someone instructing you to contact the parts purveyor of your choice(they will usually recommend one). lots of guys on here who do respond get really anal and specific without answering the question, especially when they have higher post counts than you. some will disparage any attempt you may make, will dissect the use of the english language, and otherwise attempt to discourage you from your chosen course of action. many expect new guys to toe the line and take their word for gospel. i guess what I'm saying is that you must pick thru the answers, assess and decide where you want to go from there.
some members here do not seem to have the desire, self confidence or knowhow to tackle something such as making your own parts/ locks/ barrels and will purchase what they need. each to their own.
i often prefer the lack of answers, means I'm probably on the path less traveled.
I don't know the skill or talent level you possess, and therefore must assume that you have at least an idea of what you are asking.
there are only a few guys on here whose answers i will really pay attention to. the above answer given by 44-henry is the best so far if looking for blueprints, the book is not easy to find, and is expensive when you do. Rich Pierce`s answer is good if you wish to go that route. I'm half done building my own lock from Georg Lauber`s book. it involves a lot of hand work unless you have some machine tools.
