My first thing when I saw your request was to look at your profile, so I understand you are very new to this hobby. No problem. I often send guys with questions that I cannot answer to this site. I also tell them to follow the site to for a few weeks before posting anything.
Please excuse me, but your request for a Boyle-Dayton access door leaves much to be desired. I just looked into the Gas Pump Identification book that I wrote and counted up the number of pumps that B/D made. They made at least 40 different gas pumps. All of us want to help you, but we need a little more information than what you provided, and we really like pictures.
Author, Gas Pump Identfication books 1st & 2nd Editions & Air Meter Identification books
We rebuild ECO air meters and sell parts.