Do they make the flite 100 in a 55cm frame, because if they do I can't seem to find one.

I'm about 5.11 maybe 6ft at most, I tested out a 57 cm flite 100 today and it just felt too tall. The guy at the shop lowered the saddle alot but still felt too big, but he kept telling me that the size looked just right and that khs does not make a 55cm frame. Does this sound right, being my height that a 57cm frame would be too big? Any help would be appreciated, thanks