Preferred engine rebuild kit?

I've got suspected rod knock on cold start up, and since the car has 172K miles and unknown maintenance, I'm debating on rebuilding the engine and taking the opportunity to change head gaskets and timing belt while I'm at it. I've got a 2008 non-turbo, with I think the EJ253, and can't seem to find a good rebuild kit for it. Anyone have experience with a good kit or know of one? Thanks!