You don't say what area you are from Boss. Pedro done the same thing not too long ago. JHP done the job for him. Bewarned them little blighters arn't cheap
if 7cents equals 0.7 euros what does 70 cents equal. I usually buy 4 or 5 O-rings at a time always useful to have a few spares. I had to remove a broken coupler from the fuel pump once. Waited until I got the new one to check the thread size then drilled it out to core size then managed to dig the rest out with a sharp scriber, came out like a small plastic spring.