Rich's article is at
http://www.camaros.org/l30m20.shtml.
There's several around, but many do get converted to SS's (it has a 4P code on the tag, gotta be an SS, never mind that 327 in it). Don't see them very often, that's for sure.
All 67 Camaro springs were monoleaf, 10 and 12 bolt.
All 68-9 Camaro 12 bolts were multileafs.