George Stephanopoulos –who’s replacing Diane Sawyer as the new anchor of “Good Morning America” — and his wife, Alexandra Wentworth, were in town to house-hunt over Thanksgiving, and they’re com ing back next week to shop for a $40,000-a-month rental, re ports The Post’s Jennifer Gould Keil. The dynamic duo love their current Georgetown townhouse so much they’re not sure a city apartment fits their needs. Could an Upper East Side townhouse be in their sights?