I don't know of any specific ones, might try TYM, other options are universal ones you can buy at auto parts stores where you match them up to the size "freeze" plugs in the block. The other option is a magnetic one that you stick on the oil pan or side of the block, seems alot of people on here have gone that route.
I don't have one as mine is kept inside and it usually doesn't get that cold around here( and it still starts fine when it does).
Brad
I don't have one as mine is kept inside and it usually doesn't get that cold around here( and it still starts fine when it does).
Brad