There’s a video game collector on Flickr who has uploaded a picture of a page from his E3 program from 1995. It’s an article on the Virtual Boy that he got signed by Gunpei Yokoi. Here’s a link:
Oh, it’s from Grooveraider. I have been a subscriber of his Youtube channel for a long time now, he has a lot of cool tradeshow videos. Nothing about the VB though, and I also had no luck contacting him, no answer at all. π