This is what I first thought of and recommended in my first post, I didn't read all of the entries..Where can you get small quantities of metals at a delivered price that is cheaper than a couple of pushrods? If the ones I have don't work because there isn't enough adjustment in the rocker arm screws, I can just order the genuine B&S pushrods, or see if a local John Deere or whoever dealer might happen to have some in stock.
You should be able to order from eBay or Amazon and if they say the brand name is Briggs & Stratton and they show a picture of the package then hopefully it will be a brand name OEM when it comes in.
Unfortunately some things are bad online about this as they do it with belts too.
I will not put an aftermarket belt on a machine because they never last as long and half the time they don't even fit right or work right whether it be not engaging properly or disengaging.
It simply isn't worth it for the few extra dollars you save.
I say the same about push rods.