I don't know if this is a temporary or permanent situation, but Kaito KA2100 availability seems to be poor in the USA. This is my finding after repeatedly checking the websites of two popular online radio dealers located in the USA, and searching eBay for KA2100.
Two eBay listings for the Redsun Radio list a total of 214 units available, direct from China.
Both of the aforementioned USA dealers offer the C.C. Radio SW. Has C.Crane persuaded Kaito to stop distributing the KA2100 to USA retailers? Is the supply low? Is demand only sufficient to warrant selling one of the two very similar products?
Kaito's USA website still offers the KA2100 at an inflated price (even despite the humorously out-of-date Fathers' day special pricing).
(The Kaito KA2100 and C.C.Radio SW radios are derived from the Redsun RP2100.)