You might also track down some stations that became involved in bankruptcy. A lot of the mechanisms may be parallel. If the IRS seizes a station, and it is incorporated, they may have siezed anything that belongs to the corporation: station, cars, airplanes, land, accounts receivable, equipment.
If the owner of the corportion is one or two people, each of these people may be thrown in bankruptcy and there is a court appointed administrator who disposes of the assets on behalf of the creditors.
You may have noticed that some stations in North Carolina are being transferred to a new owner upon the authority of the trustee of the bankruptcy. An application was recently filed with the FCC to approve the transfer.
The new owners had to satisfy the trustee that they would come up with the money, and now the new owners must satisfy the FCC that they will be worthy broadcasters.