Roberto and I have been good friends for about 30 years. Bought lots of things from his Toy Store over the years; spent lots of field days with him as we were members of the same club in the west suburbs of Chicago. Helped him at hamfests a few times and even worked behind his counter a couple times to give him a hand. Semi lost track of him after I retired and moved to FL 5 1/2 years ago. But did find a little info from old time friends.
The building the store was in was to be torn down and he had family obligations with limited ability to relocate at the time. So the Toy Store closed a couple years ago. He is still active to a lesser degree at fests in the Midwest/great lakes area. His e-mail is WA9E@comcast.net
Also his QRZ post may help -- he's been at the same QTH on mark St. in Glendale heights (25 miles west of downtown Chicago) since at least the mid 70s.
Hope this helps. 73
John W4FID (ex K9FID)