I have both the DeHass and Muller book, I just don't like their designs.
Which DeHaas book? He had about a dozen different ones in print. The one you want is the Single Shot Rifls and Actions, which details MANY different commercially manufactured rifles from around the world, most with enough detail in the drawings to make one, if you have the skill, as well as some comparative info on the relative strengths and weaknesses of those designs.
The Single Shot Rile Plans book has some fugly designs in it, for sure. They were designed to be made with the least possible access to a real machine shop, as well as to explore some design ideas that had not been done historically. Pretty sure he says that in the text.
Are you wanting dimensioned drawings, or just something you can work from to get the idea of how it should go together? The dimensioned drawings is gonna be a stretch. The Dehaas drawings of the Stevens action, and a photocopier or a scanner and some dicking about with print sizes, and you have about all the information you should need for a one-of build. If you figured you could download enough info to build them commercially... Hope springs eternal, eh?
Take the drawing I linked, scale it up or down as required, and start on yer way to a bunch of work.
There are some drawings out there with dimensional info of the Win 1885, and a couple others, that were originally drawn to be used for a set of castings that are no longer available. There have been a few fits and starts where folks have tried to resurrect the idea of making a run of some of these kits
Rodney Storie Rifle Castings , but nobody ever seems to come up with any when they start following leads. There are a couple other sources of kits and castings out there, but not for a 44 1/2 that I am aware of. Sharps and High Wall/LowWall Winchesters, seem to take up the bulk of the commercial survivors.
Cheers
Trev
Take a look on the Home Gunsmithing forum and search through the old posts. There are a bunch of builds documented there that used nothing more complicated than the method I suggested, working from DeHaas drawings.