I bought my Type XX1 plans for a 1/32 model here: http://www.loyalhannadockyard.com/
The site is a bit daunting to navigate so go to the main site then: Click on Taubman plans, then Click on Alphabetical Listing of plans, Then Plans - O-T.
The plans have lots of bulkhead sections (40+). Good Side, End and Plan views. No internal parts positions for building RC, however. Be advised this is just under 8 ft long. It's a biggun.
My game plan is to build a master model and then make a mould for fiberglass parts. Hope this helps. Good Luck.