Hi
If you look for a baler the person who originally designed the 1/3 and 1/6 is located here:
Case Hay Press. 5440 Reynolds Rd., Sturgeon Bay, WI 54235, Ph: 920-743-7142.
Website: Mini Haypress 1/3 & 1/6 scale case hay press plans or completed model.
The above is from the modelers list at :
Scale Model Engine Suppliers List
George Britnell who is on the site has a nice set of 1" scale plans for a Case Baler, which are real detailed. You could PM him.
I do not know of any Separator Plans. There used to be some at site out in California that were originally from Canada and I hae no idea where they are now. You might want to ask the separator question on the Smokstak site:
https://www.smokstak.com/forum/forums/steam-stationary-engines-traction-engines.7/
Guess I did not ask, how big is the traction engine? Most model separators are made by going out and measuring the full size on and scaling it down. If you have a local group that has a Separator on site yo might make arrangements to make plans of it.
Bob
PS go over to the smokstack model site and search on thresher, only on that site you will get some information.
PPS Go to this site
New West Live Steam and contact him asking about the plans, he used to have them but does not advertise them for sale. I think he bought the Canadian company.