Does anybody know of a supplier of batteries for an Aerotron UHF Handheld Crystal Radio Unknown model number, but takes an Aerotron Battery QBP-9? Battery pack is also the back cover of the radio. It measures: 4 X 2 3/8 X 7/8. Aerotron was a company that went under originally manufacturing radios in Florida. Sometimes Aerotron Radios are also associated with Repco Radios. Any help would be greatly appreciated. Rod K9ROD