Park 3rd party domain onto specific page

Site URL: https://www.birdmafia.com

Hi all,

Trying to research if anybody has found any roundabout way to park a 3rd party domain (i have elbpapercutting.com from yahoo - currently parked on birdmafia.com) onto a specific page of our site. I have yet to come across anything, and it would be fantastic if I could make this happen. 

If the only suggestion is it can be done if it was registered through squarespace, would anybody know what would happen with my email inbox from yahoo? I'm not worried about any for elbpapercutting.com as that's brand new and never set anything up. I'm worried about our birdmafia.com email inboxes (registered through yahoo along with birdmafia.com domain name.)