Magnetic Pickup

Some of you may have responded to my last post about my car not starting after installing my MSD 6A box. I finally got someone at the MSD tech that knew what he was talking about and he sorted out the problem I had. The car started perfectly yesterday twice better than it ever has I didn't have to pump the gas once after the car sitting around for 3 weeks without running. I let the car run for about twenty minutes and then shut it off. A little later I went to start it again and it didn't start. I checked for spark and I have one so my coil isn't bad. I called the tech and he said it's the magnetic pickup inside the distributor. I checked all my connections and they're all okay and it still didn't start today. My question is can I replace only the magnetic pickup in the distributor or do I have to buy a whole new distributor?