Great find, I like the insects and the galloping critter.
Here is a ancient paper model of an O Yoroi
Antique o-yoroi samurai armor
The model will need clean up and repair, but it builds up a very impressive display piece that will fit into its storage box when Boy's Day is over. Make sure you get both pages.
This page has links to books about and pictures of samurai armor, and a paper model of an O Yoroi that you can buy if you can figure out how to use the Japanese on-line retail system.
Samurai Armor
If you search previous posts you will find links to most of the free download samurai armor models that have been posted on the internet. There are also a couple of samurai related tatebanko in the downloads section of this forum.
GPM a Polish paper model publisher has a paper model samurai armor for sale. It has some inaccuracies but they appear to be easily correctable.