Scott spotted a hardcover book called The Willys Dream Kit by Jan Novak that’s for sale on eBay ($49.49). The price for a new hard copy is similar on Amazon, but the used ($25) and paperback ($20) editions are much less on Amazon.
Reviews of the book from the Chicago Tribune and L.A. Times in 1985 suggest it’s a good read.
Even after reading this review, I’m still not quite sure what this book is about, though it doesn’t seem to be about Willys:
https://www.kirkusreviews.com/book-reviews/a/novak-jan/the-willys-dream-kit/
I purchased a cheap hard cover version, so I will update it when I get a chance (could be a while at the current rate). I think it is mostly an immigrant story of leaving Europe during WWII and building a new life in the US, which includes buying/painting a jeep.