Sorry, can't see a death notice in the available online newspapers for Sunderland within Q3 1929 (plus a week in the next quarter, in case he died right at the end of Sept)
Was worth a shot -especially as I have found 3 that 'may' belong on my tree - though need to do some more poking round to confirm them :-)
Best I can suggest is that the death cert will give you an actual date of death and his address ('if' he died in hospital there may be some indication of his usual address) which may help you to narrow down where he's buried.
Boo