Taubman plans is a site that offers detailed building plans for 100's of tall ships. The constellation is listed in their set of plans. I don't know if you have seen these before?
Yeah I expected to pay for them so I'm definitely ok with that. The plan set I found online is $40 so not to expensive for the plans if they are POF which the guy who sells the plans is assuming they are my guess is he doesn't know for sure or doesn't know much about ship building to know the difference. I will wait on his plans till I visit the archive as he says that's where they are from. for a good set of plans POF Id happily pay $100 for them. I am fairly good at scaling I have a lot of experience doing it on Airplanes. 1/48 would be a nice size project for my first scratch POF build so If I cant find the plans in 1/32 it wont hurt my feelings to do the 1/48 and since all the framing will be Oak and I want to make sure its grained properly for the frames the smaller scale would be a bit cheaper.Maryland Silver Company has some good copies, although some do suffer from distortion.
I wouldn't get my hopes up on the scale - 1:48 was the standard in the day, and if that is what is in the book that is what there is. Do not despair, though, as you can (with effort) convert them. Also, don't expect free from the archive - there is a charge (it costs them to copy a fragile document, and they need to recoup a portion of the cost) although it should not be exhorbitant.
Make sure you arrive prepared with specific catalogue numbers for the itmes you want, and that you visit the right location.