Thanks to Paul, for this update:
There is news that Redsun is not too far from releasing an updated RP2100 (RP3100), perhaps within a few months. CCrane will sell it in the US, and you will probably be able to order the Redsun version on ebay.
See photos at
And see the email below from CCrane (taken from the Redsun RP2100 group):
Thank you for taking the time to contact our company about the RP3100. We will be meeting with the manufacturer next week so we will have a better idea of the production schedule. At this point we do not have an expected release date for the radio but are eagerly looking forward to it as well. Please check back with us or our website in November of 2008 for a status update; we should have more information for you then.
If you have additional questions or we can be of further assistance please email or call our toll free number.
Customer Support Supervisor
C. Crane Company, Inc.