I am looking for a way to shoot any of my Maynard’s in .22LR. A Hadley device, a sleeved barrel (offset I believe is the terminology) or some way I am not aware of. 
Thanks

BD
The Maynard 1873 with a Hadley device uses an offset firing pin and the Model 1881 uses a barrel turned off center, to shoot the rim fire 22 LR.
If you have a lathe or a friend who has one, another way to shoot the 22 LR in your Maynard is as follows:
Find a 22 LR barrel that has been bored off center.
Find a shot out Maynard barrel and cut the barrel to give a 4 1/2" mono block.
Turn the breech end of the 22 LR barrel centered on the outside and not the bore.
Loctite, epoxy or thread the barrel into your mono block.
It should look something like the photo below and cost hundreds not thousands.
Otto