John,
Carlo is an Honoree of the American Fighter Aces Association, so you might try the contact page on our website at
https://www.americanfighteraces.org/
His twin brother died almost ten years ago. I think he gave away his photo collection; not sure where, or even certain that he did donate it. Before 9/11 he was going to give it to the Pentagon for display in the hallways, but the powers that be there decided that it was too risky to keep his collection in what had become a target. Haven't seen him at an AFAA convention is a number of years. According to Hubert's obituary he would now be about 85 years old.
Enjoy!
Frank.