It's really just going to take a bunch of searching to find re textures of her free hair , but there won't be a single place or places that have much of it. I just googled Sims 2 Peggy hair re textures , went to the images and snagged a few quick links for you.
http://reinesdelorient.livejournal....air%20retexture
http://stakeit-uk.livejournal.com/84032.html
http://fashionista125.dreamwidth.org/tag/sims+2
http://vimpse.tumblr.com/post/55863784943
http://hat-plays-sims.dreamwidth.org/14324.html
Some creators will have tags for searching just Peggy hair , most won't though. Some sites have re textures for both Sims 2 and 3 , so you'll have to be careful about that. GOS should have quite a few available , The Peggy pay stuff and free stuff won't be separated , for the most part , if it says Peggy donation March '09 that's about as much help as you'll get in that regard. Make sure the meshes are included. Peggy's numbering system was always a disaster as well , so that's really a major pain. The hair mesh number never matches the hairstyle number and re texturers may be using either number.
Shotgunning bland cucumbers since 1974