We might be in Macao rather late, 9pm on a weekday, are there street vendors open then selling the pork chop bun? This is one of the main reasons we want to go to macau. We will even go to a non tourist place, as my husband speaks Portugese.
Café Tai Lei Loi Kei in Taipa Village is a local institution when it comes to pork chops bun. And Taipa Village is nice to walk around. Worth the combo a walk and a bun if you have the time.
Enjoy Macau (and the pork chop bun)!