Sangue di Giuda

Sometimes we get asked for sparkling red Burgundy, but I hadn't heard of Sangue di Giuda DOC until this week. One of the e-mails that awaited me after my week off was from a customer wondering if we knew of a source for this sweetish, lightly sparkling red from Lombardy. I hadn't anything intelligent to suggest, beyond
  1. ask the blogless Irish wine importers, or Lorraine at Italianfoodies, and
  2. try to chat up a supplier direct
Has anyone tried this wine? I must admit I'm not in a hurry to import it, as it sounds like a slow sell to me, but it would be interesting to hear from anyone with a view on the stuff at all.