Wilsonman, I have the same kit that I bought new, and am building the same plane, with a twist....I am putting the thing on a "diet". If I can help you with a pdf scan of any of your missing parts, just let me know, and they can arrive to you via email. If you want to see what I am up to, and the reason I can supply you with scans of any parts, look at my build thread here >>
https://www.rcgroups.com/forums/showthread.php?2073875-Top-Flite-P-51-on-a-diet. The last time I touched it was 3 plus years ago, but now that I am retired, I will get back into it. I am soooo glad I found your thread because I want to really watch you build the body and see if you end up with the same "condition" that I did, which is way too hard to define in an online forum... will have to show pictures when the time comes. It has to do with former #9, and the way it makes the body shape change, so don't glue in former 9 just yet. I have marked up the plans and build book with all kinds of notes, and am willing to share. BTW, I had a personal conversation with David Ribbe about wing tip wash out, and if you notice, it is NOT on the plans. He did that because he said the no one pays any attention to it anyway, but the real amount of tip washout is 2 degrees. The "feet" on the wing ribs set the washout due to the wing being built upside down, but the wings get warped when the sheeting on the other side of the wing is applied.
Neil