Ian Nutt has recently had a small number of meters for the 669 meter unit manufactured and which are available for sale. These are suitable for installation in the alloy casting of the 669, but there will be a need to make up a new paxolin panel to support the resistors,  pot etc as the terminal separation on the new meter is different from the original. However this is not a hard job and any reasonably proficient person should be able to manage it quite easily. Anyone interested in finding out more about these meters should contact Ian on iandcnutt@msn.com.