They show up on EBay regularly. Search on (Collins filters). 73, Guy. ----- Original Message ----- From: <[email protected]> To: <[email protected]> Sent: Tuesday, September 30, 2003 6:43 PM Subject: [Collins] R-390 Filters > Anyone have or know where a set of R-390 filters might be available? If > so at what cost? Thanks > > Sponsored by the Collins Radio Association > http://www.collinsra.com >