Thought it might be best to change these before fitting my STi pinks to my WRX but really £70 for 16 o rings? anyone know of another re-seller?

 

I would say youve been quoted for the wrong orings, I had a similar problem when ordering these from subaru, they ordered the square edge ones for under the inlet manifold. You should try Mark at lateral, iirc i think he keeps the top and bottom orings for injectors as he sells injectors...

 

Try Alyn at AS Performance or Mark at Lateral.