Radio Shack Pro-106
You might try Amazon.com as well. I just picked up a used PSR-500 (same radio - different name by the manufacturer of the radio for Radio Shack). The alternative might be to search the Radio Shack website for the radio and see if you can locate a store near you (you can set the search parameters) to see if there's one still in a store near you. Until just recently there was a store in the north Denver area that had one... Good hunting!