Economical replacement rocker arm set?

The pushrods sound OK. Come up with some way to lay them in a trough or groove with some sort of stops clamped snugly at the ends as a size gauge to see if #3 ex. pushrod is particularly shorter than the others.

Take apart another lifter to see how the parts go in and see if they are identical. The little disc with 4 holes looks a bit curved and maybe needs to go in one particular way.

Been trying to think up a way to check the rockers to see if #3 is bent upwards at one end more than the others. I'm drawing a blank on something easy.....Swapping it with another RH rocker might show that right up.