Let me suggest you "Moments of Joy", "Literary Giants" and "The Moving Finger Writes" for starters. They're quite long stories, usually centered around McQueen and what being an InVitro meant to him.

"Moments of Joy" is a McQueen/OFC romance, but one of the very few that I can buy without any second thoughts. "Literary Giants" follows Kylee's fate after she's been freed from Chig captivity, and McQueen's, after returning to Earth, a leg shorter.