I hear you.
A couple of years ago I looked at my (less than) trusty (and certainly very) old Island of Misfit Toys collection of kegs, most of which were converted from pin lock to ball lock, and no two were really the same. For years I had been fighting hard to keep them running. I had an entire bookmarks folder dedicated to parts conversions for old converted pin lock to ball lock kegs. Eventually, I came to realize that I was just wasting my time, frustrating myself, and making this fun hobby a real chore. So I bit the bullet and bought 3x 5gal and 2x 6gal brand new shiny Torpedo kegs over the course of a year. All of the sudden my brewery became so much more enjoyable! I didn't have to read the notes scrawled on the sides of my kegs regarding their replacement parts requirements and kegging became quick, easy, and enjoyable. No leaks, just a standardized set of replacement parts, it became so much easier.
Was it expensive? Hell yeah! Was it one of the best upgrades I've ever made to my brewery, without a doubt!