I have these balls listed on eBay but I'm offering discounted pricing for Net54 members. PM me if interested!
1991 New York Mets #1 - $75 shipped
https://www.ebay.com/itm/225557435045
1991 New York Mets #2 - $75 shipped
https://www.ebay.com/itm/225557434542
1991 Philadelphia Phillies - $40 shipped
https://www.ebay.com/itm/225353071335