@pinthrift We're around to fix the Music Reference amps but will no longer touch them if they have been modified or have had unauthorized parts used in them. The latter would include after market "boutique" fuses.
For the record Roger updated the fuse specs to 250 mA ceramic (not glass) fuses from the original 160 mA spec. We have them here or you can get them from reputable sources online such as Mouser or DigiKey. Roger's preferred fuses were made by the Littelfuse company.