Give raxles.com a shot. They are rebuilt with new outboards i believe. I bought stock ones, but I think they have heavy duty ones also. Just call and ask. Ive had mine a while with no problems. Decent prices too. For stock setups, just dont let anyone buy the pos from NAPA. We put some in my gf car, and they took like 2500 miles to break in (yeah i know rebuilts and new dont need to be broken in). I later found out they are notorious for being POS peices