you can use part of a 90s era saturn (car) starter which is made by valeo, the part you can use is the body with the fields, as this is what usually goes wrong in the airhead, you must use the housing from the bad valeo as the saturn one is completely different, thereis a company selling all the valeo parts now so i don't know that it would really make any sense, If somebody feels they need to rebuild a old bosch, I usually have some dead ones.