Non VVTi 2jzge rods are the same as GTE rods, so that may broaden your rod search. The non VVTi GE pistons are stronger than VVTi pistons, but they aren’t the same as GTE pistons. That said, if I was tearing an engine apart, I’d probably go all-new parts. It’s a lot of effort, and if one of those old rods or piston let’s go, it could damage the block, oil pump, cams...you get the idea.
Pick a horsepower goal and stick to it. It’s OK to dream and ask questions, but do some research, too. Most of this info is in the forums. Good luck!