I was dropping my my pistons in this weekend and on the last cylinder(8) the ring compressor came loose as i was taping the piston in. it bent the upper and lower oil rings not the scraper oil ring. were can i get two new ones? they are federal mogul sealed power .020 over rings. should i call MMR and ask them? they took 5 weeks just to get me these rings. will i have to buy a whole set or can i just find the 2?