I assume that means you have to know what you are looking for before you can find it! :) I was hoping they might have some patterns for some costumes. Clothing from yesteryear is interesting, but when I usually make costumes, it's for some party or Halloween contest or some such.
However the one I found does not appear to be available for download. I see two vendors selling it. If there are any for download, I didn’t find it. :)
That's disappointing. Also from my browsing, I see mostly women clothing. Only saw one example of what would be regarded as Mens clothing.
Another idea I had was making some Zoot suits, but I think those are more from the 1930s.
There are clothing categories including costumes (I see a male matador costume - there’s hope).
https://vintagepatterns.fandom.com/wiki/Category:Costumes
Can sort by date or by clothing category, as well as manufacturer
Clothing category:
https://vintagepatterns.fandom.com/wiki/Category:Garment