FIFY ... I'm certain you meant that as a joke since a call to Allen Moore (AllenM on INGO) is all that it takes to rectify this situation.My marlin XT-22 doesn't have a threaded barrel . My M&P22 does though!
I picked up a Rugged Obsidian 9mm which will work fine for 22LR .
In case you didn't know, he even has a forum on INGO ... https://www.indianagunowners.com/forums/diamond-collision.260/
I am curious to learn more about why you think a suppresor designed for a centerfire round will work better than a dedicated rimfire suppressor. Sure, cost comes into play, but, like you, I'm still learning about suppressors and what is the best non-bang for your buck.