Ignition Cylinder help

[K2Orion]

I found a few other posts on this topic but none answered my question and I figured I should post it rather than hijack another thread.
My cylinder is worn out. I can remove the key regardless of its position. The key must be wiggled and jiggled to find the "sweet spot" before it can be turned. I'm sure the one and only well worn key I have is a copy of a copy and is a big part of the problem. I would just replace the cylinder with a new one from a parts store but this is the original and the key still operates the doors as well.
So is there a way to tighten up the cylinder? Or get a replacement cylinder and have it re-keyed to match the doors?