Are you at the right house? Dwarven village map

A possible solution;
Reviving dead NPCs

You can swap data files from a save where he was alive to get him back temporarily, but restoring the original file would eliminate the experience from completing the quest (it would complete the quest in the log, though).
See the post 'Rimmer is missing', quoted near the end of the post;
FIX for broken Imp Council Member quest

If you just need some of Rimmer's ale for the easter egg area, you get get them using;
Lost Items - guide and directory of inventory files