Welcome to the board.
Here's a recent post:
http://www.quiltingboard.com/main-f1...n-t285640.html
My board has the built ins you refer to. It's a Mary Proctor double flip. Still available at fine yard sales! I have seen newer ones with a built in cord minder, but not with the outlet, like this one:
https://www.wayfair.com/Household-Es...FQsKaQodjaALUQ
Google 'ironing board built in cord minder' for several other models.