Some things you just have to make yourself. There are no mini venetian blinds (or anything similar) for sale, at least not ones that look good. So here is how I made mine, using something I have been saving for 10 years.
The scene I am doing includes these windows:
Window blinds at different levels. So, I found this old Chinese calendar in my stash of stuff, saved from my son’s Asian themed birthday party at least 10 years ago:
Looks like venetian blinds from the 1950s to me except the fabric ribbons holding up the blinds need to be white. And I have to unstuck my fingers which are full of superglue!
Actually the problem was weaving the ribbon into the blinds. They look okay when brought to the front. A set of blinds installed: