If the reason you want that gun back has anything to do with correcting a bad decision many years ago, let it go. Correcting bad decisions are steps most all have taken, but how to correct all of them?

Held an Old nickel SAA decades ago for about 20 minutes, put it down, came back and held it another ten or fifteen minutes, and walked away from it. Had a lot of responsibilities at the time and didn't want to further burden my credit card. It was as mint as perfect. Hate myself for letting that one get away. Let a beautiful young lady get away many years ago.
How I hate bad decisions, but many live on with us.

I'd go by my Dad's grave for a little while for a reality check and a talk. I'm sure he would tell you not to worry about it.