BPI sells reloading supplies for the 24ga - go here
http://www.ballisticproducts.com/searchprods.asp for a roll crimper. Other than that all you need is a dowel with a nail to deprime [ and a block with a hole in it for the shell to sit on ] , another dowel to prime and the same dowel to push plastic or paper wads in the shell. Or a Mec Jr. press set up for 28ga and no resizing ring would get through everything but the crimping. If you have access to a lathe you could make the right size resizing ring - about .004 bigger than a factory shell. Good luck.