I am 5ft 3" and found it hard to get a cyclocross bike to fit.
The Kona jake the snkaes go down to a 49cm frame but then they seem to be quite long - top tube length of 53cm so that ruled them out for me.
The Ridleys go down to a 48cm frame but again the top tube is quite long - but the Crossbow does come in a XXS 41cm frame as a special order - hmmmm nice!
The Trek X01 I also goes down to a47cm frame but again you need to look at the geometry.
Or you could go custom from Paul Milnes.
I originally bought an Islabike - the luath 700 which was a good fit but it is a kids bike and does have its limitations for an adult.
I eventually replaced it with a Pinnacle Expede in a size small and made some modifications - womens bars, de-shimanod it and replaced it with campag, short stem and short cranks and a decent saddle!