I have 2 MDT (10) round AICS pattern magazines for the .223 Rem/5,56 family of cartridges. Used but not abused. $55 shipped. Would trade as well...I could use a .452 or a .310 lube sizer die....or a 309, I don't mind lapping it open.
https://mdttac.com/223-mdt-polymer-aics-magazine/