If you are familiar with Harry Potter, what you are asking for is the directions to Diagon Alley.
To provide a picture of any of my builds, I want a truck full of money as I would have to wear a bag over my head for the rest of my days...
If that gives you any indication as to how starting out in the building hobby goes ...
You may want to rethink the whole thing before proceeding! It's a great hobby however if you do get involved. Just don't say you weren't warned!
Mistakes and all are worth the venture IMO. You can read about it, talk to people ect. You can get it perfectly in your head. You have to lay hands to it and suffer though the mistakes. It is a craft that has always required an apprenticeship to become a master builder. There are so many skills that have to be perfected to recreate a perfect longrifle that it can become a lifelong journey and never quite get to the peak.
Dixons gun shop in Kempton Pa would be well worth the trip. The gun fair held at Dixons location the last weekend in every July... all parts on display for sale. Good place to shop hands on. A winter event is held at the Country Cupboard in Lewisburg the first weekend each February. Not as many parts available as Dixons gun fair but a great place to go none the less. Many faces seen at the Dixon fair will be there. Tigerhunt is a gunstock supplier in Pa that I've had nothing but a good experience with. Wayne Dunlop in Va is another. An internet search should turn them up. For other parts? Outlets can be found on the internet. Track of the Wolf is one to get you started.
You will need a book. Chuck Dixon (Kempton) has published one. I would highly recommend his. Peter Alexander has one called the Gunsmith of Grenville County. He is controversial with some builders. It's a good book to have though. He also combined with Buchele and Shumway with Recreating the American Longrifle.
With more than one book, you have what amounts to several people all telling you how to do the same thing. Whenever you have that going on, one will explain something a little differently than the others. That can help explain and answer questions about tasks.
My advice is to go slow, investigate, talk to people face to face. Pick up a couple of books "first" before the parts.
What county are you in? A great source for face to face support can be found at a number of Pa Federation of BP Shooters clubs around the state.