Good luck. They don't make FM tuners anywhere near as good as they did 20-30 years ago because the customer demand isn't there. Plus it sounds like you are in a typical steel fram office building, which cripples reception without an exterior antenna.
Many radio stations today also broadcast over the internet-any chance of getting your radio fix that way? That's what I do but my boss is a peach of a guy (ie, self-employed).
You might want to pick up an old radio or two at tag sales/Goodwill and see how they do. If you happen across an old Advent radio, hop on it.