the first pic, you will never find those monocores. crossman came out with them but the atf quickly slapped them down and contacted everyone who bought one and had them surrender them.
ive made a 9mm out of the solvent trap cups in the second picture. they work okay but its also with a sdta "D" cell tube so theres a lot of volume in there.if youre just making it for the 10/22, i would go with roninpro for their kits. i pick up one of the first gen "D" cell kits for a 45 form 1 i got in a month before 41f
uckyoupeasants went through. the second gen kits look even better but a little more price wise.
this would work perfect for the 10/22:
https://www.roninpro.com/collections/ri ... long-gen-2