OK, after some searching I found one (near) East Valley option: Robbie Fox's in Tempe serves a blood pudding and mushroom starter. Credit New Times for that find.
EDIT: Looks like someone needs to add an entry to the places database for Robbie Fox's.
I don't know of any places in the East Valley. If you'e willing and able to venture west of the 101, you can try Christopher's, which serves a delicious boudin noir. Tapas Papa Frita in Old Town Scottsdale lists a morcilla tapa on their menu. I haven't eaten at TPF in many many years, so I can't comment on the quality.
2502 E Camelback Road, Phoenix, AZ 85016
Tapas Papa Frita
7114 E Stetson Dr, Scottsdale, AZ 85251