sources for historically significant handwritten documents written in vernacular Chinese?

[大块头]

I've written some code that lets me easily create handwriting stroke animations. I think it would be fun to animate some handwritten documents of historical significance. Have any of the universities that collect such documents published scans online? I'm specifically looking for documents relevant to PRC history (big character posters, red guard diaries, etc.), but I'd welcome any suggestions.

 

[889]

黑板报？Contemporary ones are easy to find through Google Images and there are pattern pamphlets for older ones you can find at old book stands.

 

https://wantubizhi.com/pic/黑板报艺术字体设计/

 

[大块头]

Thanks, though I can't access those older ones because I'm in the US at the moment.

[889]

These are the sorts of things I'm talking about.

 

https://wantubizhi.com/pic/六十年代黑板报/

[大块头]

I wonder if there is a complete scanned copy of 雷锋's diary somewhere online? https://www.sohu.com/a/378059353_701668