Top end rebuild parts

[KingKJ]

I need some help locating some quality parts to do my top end rebuild with, preferably in a kit and maybe some parts that aren't included in the kit that should be replaced on a motor that is 225k miles old. Luckily after scoping the pistons it appears the lower part of the engine won't need to be rebuilt unless we discover anything else, so just top end parts. I kinda know what I need to get, I just don't know where to buy it from.