Hello I am looking for a crystal filter for Harris RF230 or RF2301. It is a 9MHz USB filter and it has three different part numbers. PTI model 5826 Manufacturer part number 10007-0621 NSN 5915-00-503-2424 Also I can purchase the whole filter board for RF230 or RF2301, 6628-0650-04 Thank you for your help from Korea.