The dealership diagnosed my 2002 Miata by saying the "actuator control valve is sticking". I was quoted $1600 to replace the oil control valve and variable timing actuator. There is a TSB for this issue, I believe, unfortunately I am wayyy out of warranty. Is there any place or way to fix this cheaper? and where could I buy JUST the two parts (also, how much are JUST the two parts)? Thank You in advance