The Saved Sims are the ones you've made in Bodyshop. If you're wanting to save the born in game Sims and general Maxis Sims (like the pleasants), then you'll find those inside of the Neighborhoods folders. N001 is Pleasantview, N002 is Strangeville, and N003 is Veronaville. I may have those mixed up but N001 is definitely Pleasantview. G001 is Riverblossom.
Anyway, inside of the individual numbered folders there are subfolders one of which is Characters. Those are the Sims that you've been playing with and seeing in the neighborhood. Hopefully, you were able to back up those folders before doing the uninstall as they may have been overwritten if you didn't.
