The mount tends to fail because it's so thin, but Honda did that because this is a 3 cylinder with no balance shaft; it vibrates a
lot.
This is the spark plug you want:
SPARK PLUG B (ILZFR5A11) (STAMP B) (NGK) for 2000 Honda INSIGHT|12291-PHM-A01
The rotors on mine were starting to pulse when stopping, so I get a set of Rock Auto special $10 rotors, and couldn't be happier.