It really is sad that the majority of "car guys" that have spent decades learning about cars as a hobby, still have no idea how difficult interior work is on cars and the skill that is needed. They do an amateur job of installing one premade seat cover and say "Hey, why are you charging me so much money, you're job is really easy!"

Mobile Solutions in Tempe, AZ sells the whole set. After getting the set you might be able to get the magnets in bulk somewhere else for less money.