Head gasket location and part

[vidfan]

So the dealership just diagnosed my car with a leaky head gasket. Not paying the high price for them to do it. Does anyone know by chance know where type of gasket is installed on an 08 Yaris Sedan and the type of gasket installed? Trying to avoid using a third party part if possible.I tried googling for the information but can't find anything concrete. Thanks for the help.