ho w to find a aftermarket d c contactor?

i have a mtd yard machine 14 hp 38" cut.. the contactor went out along with the starter teeth.. i found the starter kit but i con not find anything for the contactor.. the part is by TROMBETTA 812-1211-11-16 12v/int. can anyone please help?? i have been looking for over a week and i am at a dead end.ty