I bought three
KL23H276-30-4A just before Christmas from Keling, good communication, good service, reasonable prices. The steppers work well.
Shipping to Canberra (via USPS) took around two or three days after placing order (can't remember exactly) shipping cost was US$40.
I originally was going to get four but shipping went up considerably because of the order weight - I'll place another order for three when I do my lathe then I'll have two for the lathe and the other one for the mill's fourth axis.
Hint: Whoever you get stuff from in the USA get them to send it USPS. Fedex and UPS charge like wounded bulls! I don't buy anything from the USA unless they can ship via USPS, if they don't appear to do it - just ask.
Cheers,
Dave.