F2000 SX and R1000 had stars and stripes paint in 2000 but catalog doesn't show that saddle. Wonder if it was made up with the intention of being used on those bikes, but for whatever reason wasn't used in the catalog photos.
Hope you locate it.
This one in STL is either a 58 or a 60, looks in pretty decent shape.
https://stlouis.craigslist.org/bik/d/cannondale-black-lightning-14/6530821201.html