exposure 21 PREAMP/ circ 2000

Hi- I have an exposure 21 preamp dating back to when John Farlowe was running the company. Now in NA it is run by Bluebird. At any rate the fuse keeps blowing and is beyond my capacity to fix the root cause of why it is blowing. Are there any dealers or service centers in the us able to fix my older unit.

If worse comes to worse how is the new 3010 compared to the old 21?