Hello from MsRobin

Welcome to the forum! And thank you for taking care of Quincy.

Guinea pigs are definitely herd animals, and prefer to be with their own kind. Is it possible for you to get a friend for him? Most rescues will let you bring Quincy in for an introductory "date" to let Quincy pick out his own friend. Depending on how old he is, he might do well with a boar pup.

How did you do the reintroductions? If they've been separated, you have to start from scratch. Read Guinea Pigs Social Life -- the Introductions section is about halfway down.

I purchased a cage with a removable wall for acclimating new partners. I live in a small community and they do not take gp's at the shelter. My option is a pet store.

Welcome and we love pictures of piggies here!
Depending on where you live, people on here can help you locate a piggy needing a good home.

If you'll post the city you're closest to, we'll help you find a rescue or a shelter. Many will set up "piggy trains" to transport a pig closer to where it needs to be. Or check on Pet adoption: Want a dog or cat? Adopt a pet on Petfinder. Or Craigslist or Kijiji. There's almost always another choice than a pet store.

I agree that Craigslist is a great option or even Freecycle if you have it where you are. You're a great mom, stepping up to care for Quincy. I wish more parents were like you.