1 I would suggest mathematically scaling every thing and redrawing on your plywood, or other media you choose to build from. I have currently done this with the [link=http://www.rcgroups.com/forums/showthread.php?s=&threadid=77749]Los Angeles fire boat #2 by 230 percent[/link].

2 The only full size set you truely require is the frame plans, bow and stern keel profile. The rest can be scaled using the first suggestion. Once the hull is fiberglassed, I typically pull out tht keel and frames anyway. If you need the extra frames, interpolating the added frame lines can be done in 50 percent, or 33 percent steps between existing frame lines.

3 You might contact the webmaster here
http://www.nwlink.com/~pfleming/
As they are currently building some 1/48 scale tugs and destoyers for a new game.
The Webmaster typically has sailed only British Warships.

(Redrawing a set of plans that has been enlarged, can take 3-4 weeks to draw and detail decently. The fee would run high at 25 bucks an hour.)[X(]
[link=http://groups.msn.com/ModelersAndHobbyForum/japaneset103lstbuildup.msnw?action=ShowPhoto&Photo ID=96]1-72nd plan rescaling in progress.[/link]